Big Bang Butt Theory

SUMMARY: Theory of lesbian anal orgasms is proved with a bang.

NOTE 1: This is a Literotica Nude Day Story Contest 2024 story so please vote.

NOTE 2: Thanks To Sams Island for editing this story and great advice.

BIG BANG BUTT THEORY

The three girls had been drinking for a couple of hours as their respective men were at some games night. For the brilliant boy-men it would be a nerdy all-nighter, so the ladies had set themselves up an old-fashioned slumber party. Of course, two of them didn't realize that for the third it would be her very first slumber party, having been a social outcast all her life once her own genius had shown itself in primary school. But tonight, the wine and friendly female chatter had shy Amy, of the big glasses and big brain, feeling like one of the girls.

At the stroke of midnight, Bernadette's phone buzzed and she looked at it. "Oooooooh," she said, a sly smile crossing her face.

"What?" Penny asked, seeing that look that could only be described as mischievous... which usually meant trouble.

"It's Nude Day," she announced, standing up and pulling her dress up and over her head in a heartbeat.

"W-w-what are you doing?" Amy stammered, as one of her two best friends was suddenly standing before her in a bra and a weird garment that held up odd pantyhose.

Bernadette unclasped her bra and tossed it to Amy, tipsy enough to do this. "It's Nude Day. I need to be nude."

"You are not wearing panties," Amy pointed out in utter awe. She couldn't take her eyes off her friend's hairless pussy... something she had only ever seen before in the porn films she watched as research to learn how to please Sheldon. At least, that's why she'd started watching them. But as her frustration over Sheldon's failure to make a move on her had grown, she'd begun watching more of them as she was forced to seek sexual release on her own. She'd also begun moving away from simple man-woman sex after discovering the many different types of porn.

"I seldom wear panties, as I need to give Howard quick access to my pussy," Bernadette explained, as she shot a look over at Penny. "It's why I always wear a garter-belt and stockings."

"Is that what those are," Amy said, thinking they were way sexier than the tights she wore. They were so shiny and seemed just a little naughty. She wondered if knowing she was wearing revealing lingerie might finally prompt Sheldon into action. She'd have to look into it.

"Yes, feel," Bernadette said, putting her stocking-clad foot on Amy's knee.

Amy was shocked by the other woman's bold move but was so intrigued that her hand moved reflexively to the nylons. "Oh my!"

"Softer and sexier than what you wear?"

"They are," Amy agreed, her hand mindlessly roaming up and down the silky sheer stocking, as if she was petting a puppy.

"Why don't you get undressed too, Amy?" Bernadette suggested, even as she allowed the dazed virgin to continue to caress her leg. Amy's eyes went wide.

"Bernadette?" Penny said, as she admired her friend in sexy lingerie, the shaved pussy in full view making her mouth water. God, she couldn't get enough of her blonde friend's tasty, addictive pussy, but was she really going to try and bring Amy into things?

"You too," Bernadette said, giving Penny a look that said, 'Do as you're told and don't you dare question me'.

"Fine," Penny shrugged, acting like it was no big deal, as she pulled her top up and over her head revealing a cute lace bra.

The reality was she always obeyed any order Bernadette gave since the first drunken night she ended up going down on her before getting fucked by a strap-on to multiple orgasms and called a plethora of nasty names which enhanced the pleasure... something Leonard couldn't do even though Penny had bluntly said it turned her on to get called names in the heat of the moment. Unfortunately, Leonard was just too much of a nice guy.

Amy stared in awe as her bestie took off her blouse. She'd often wondered why so many pornos supposedly meant for men brought in a second woman who played with the first woman as much as the man, but she realized now she would love to watch Penny strip even if Sheldon was there too.

Penny looked directly at Amy as she slid out of her skirt to reveal the thigh high stockings she wore every time she came to Bernadette's because she was ordered too. She would normally also be sans-panties, again at Bernadette's command, but tonight she had on a solid pair of cotton undies. She'd kind of felt she had to since Leonard had dumped a load in her asshole before she came over and she didn't want the cum to leak out of her and onto the furniture. "It is Nude Day, after all," she said as she neatly lay her skit with her blouse.

"Isn't that about daring to go nude during the day?" Amy asked, trying to hold onto any logical string as her mind raced and her heart hammered. Her hands continued roaming over Bernadette's legs even as she stared at Penny's perfect body. The third woman wore a cute bra and the same kind of stockings that stopped at mid-thigh, though without a garter-belt and with panties.

"Nude Day is twenty-four hours," Bernadette pointed out, barely resisting pulling Amy's dazed face into her beginning-to-get-wet pussy. While she already had plans to be sitting on Penny's face later and giving her a good fucking, she now pondered if the regular twosome couldn't turn into a threesome.

"I guess," Amy said, as she watched Penny unclasp her bra and reveal perfect firm tits and hard nipples... tits she had fantasized sucking on and cupping in many of her home alone bedtime fantasies.

"We can call it Nude Night if you wish," Bernadette shrugged, moving her leg away and sitting back down. "Regardless, if you are sticking around, starting now this is a nude house."

Amy found herself disappointed when Bernadette moved her leg away... while the majority of her lesbian fantasies were about Penny, she'd also had some inappropriate thoughts about the bossy Bernadette... like being told what to do and mindlessly obeying. Such a concept seemed rather freeing.

As Penny slipped out of her panties, she asked, "Does that include the thigh stockings?" Her question was mostly in jest, she was pretty confident she knew the answer since Bernadette had a real nylon fetish.

Amy's eyes went wide at seeing that, like Bernadette, Penny had no hair on her pussy. How would they even do that?

"No, the nylons stay on," Bernadette said in a serious tone.

"I thought so," Penny said, as she placed the panties with her other clothing to make sure the likely stain of Leonard's cum leaking out of her asshole all night wasn't revealed. She also hoped Amy didn't catch on to her submissiveness to Bernadette.

Amy was nervous, her body didn't match the raw sexiness and perfection of these two women. Yet, she didn't want to leave. This was strangely exciting and felt like a plot of many of the erotic stories she read. While she didn't expect this to follow the simplistic plot of porn, she was getting a little sexually excited and wanted to see where things went.

"Getting naked or going home?" Bernadette asked, in a tone that implied this was a moment of decision making.

Penny wasn't sure what to think. On the one hand, she kind of wanted Amy to leave so she could bury her face between Bernadette's legs. Seeing her in that sexy all black lingerie made her pussy burn and her mouth water; yet she was also wondering if perhaps the two of them could take Amy's virginity... the poor girl deserved some real pleasure.

"Um," Amy said, nervously.

"Just do it, Amy," Penny encouraged, knowing if she suggested it Amy would do it.

"Okay," Amy said, wanting to fit in and to please Penny. She stood up and pulled off the large sweater that covered up any sense of shape she may hold.

"Why do you hide those gozangas?" Bernadette asked, as she admired the large breasts held in check by a terrible bra.

"Hide what?" Amy asked, shivering slightly now in only a bra to cover her top half.

"Those huge tits," Bernadette said, blatantly staring at the mouth-watering rack.

"Yeah, shit, Amy," Penny said, also in awe, "your breasts are amazing."

"Uh, thanks?" Amy said, not used to getting compliments for anything but academia... but kind of liking it.

"I mean, those tits were made for Nude Day," Penny enthused, wanting to walk over and cup them and suck on them. Since her breasts were kind of small, and her biggest insecurity, she had a fascination for big tits. For her, in every possible way, size mattered.

"You're making her blush," Bernadette said, also admiring the large breasts held poorly by the lame excuse for a bra. They would definitely be taking her bra shopping.

"No one has ever complimented my body before," said Amy.

"Well, don't hide those amazing knockers and you'll get more attention," Penny said, clearly drunker than she thought she was.

"Yes, show us those big titties," Bernadette encouraged.

"Okay, okay," a flustered but flattered Amy said, getting a rush of adrenaline from the sudden 'wanted' attention she was getting, unclasping her bra and tossing it right to Penny who caught it.

"Yes, mine," Penny said, as if she had caught the bouquet at a wedding, then quickly shifted her gaze to her nerdy friend's now free large tits and their huge, hard nipples.

"Those are perfect," Bernadette said.

"Really?" Amy asked, looking over to Penny who seemed to be staring at her.

"Really," Penny agreed, "they are absolutely magnificent."

"Thanks," Amy said, surprised she suddenly felt comfortable topless in front of her two friends.

"Does Sheldon not know what you are hiding beneath your boring, er baggy, er..." Penny paused, not wanting to insult Amy as she corrected, "loose fitting attire?"

"He has never seen me naked," Amy admitted.

"Jesus," Penny said.

"Of course, you are not really naked yet, are you?" Bernadette pointed out, as she walked over to Amy and pulled the equally baggy skirt and pantyhose down with one quick smooth pull as she dropped to her knees in front of the large-breasted innocent.

"I, uh, oh!" Amy sputtered, as her skirt and pantyhose were suddenly around her ankles.

"Panties too," Bernadette said, remaining on her knees as she moved her hands to the grandma panties and pulled them down as well.

"I can't believe this is happening," Amy said, as she stood there stunned and mindlessly lifted up her feet to assist with her surprise disrobing.

Bernadette held the grannie's up toward Penny and said, "We need to take her shopping."

Penny took in the full bush and added, "We are also having a full girls' spa day soon."

"We are?" Amy asked, shivering at the sudden chill as she was now completely naked in front of other women - or anyone for that matter - for the first time since she'd graduated high school... being an undeveloped 15-year-old senior when her classmates were physically mature 18-year-olds had made gym class a special nightmare for a girl who'd skipped several grades due to her intelligence.

"Yes, you need some new bras and panties, some new nylons and we need to help you with this," Bernadette said, as her hand went to Amy's pussy and touched the hairy area, which she was pleasantly surprised to find was completely wet.

Amy inadvertently moaned and gasped simultaneously as the first non-medical hand to ever touch her privates other than her own was not her boyfriend Sheldon's but one of her female friends.

Bernadette quickly moved her hand away but smiled at feeling the wetness. She stood and said, "I'll be right back."

"Um, okay," Amy said, standing their butt naked.

Penny caught a wink from Bernadette as she walked by and wondered what nefarious idea the sex monster had. Penny knew their hostess had more than a few strap-ons and sex toys in a sex trunk in her closet. To the big-tittied virgin, she laid on another compliment, knowing this would boost Amy's confidence. "Amy, you have a beautiful body."

"I do?"

"Yes, you shouldn't hide it, you should flaunt it."

"I don't know," Amy said. "I wouldn't even know where to start."

"Well, likely with some sexy undergarments, perhaps some lingerie, definitely some nylons like mine or Bernadette's. And of course, tighter sweaters or dresses that show off instead of hide those amazing tits," Penny suggested.

"I would like to get some lingerie like Bernadette is wearing," Amy admitted.

"Yes, you would look hot in some lingerie that showcases your big tits." Penny walked to Amy and spun her around. "And this juicy ass."

"I have a juicy ass?" Amy asked, in complete awe of Penny's words and captivated by the attention she was receiving... this a scene right out of her fantasies.

"Oh yeah," Penny agreed, her hot breath going to her friend's neck as she brazenly squeezed the two ass cheeks, "these are perfect." The hot blonde had already been imagining motorboating between Amy's outrageous mammary glands, but now her pussy juice began running down her thigh as she imagined doing the same to the bountiful ass in her hands.

A chill went up Amy's spine at having the hottest woman she had ever met squeeze her ass. While she had been focusing on her fantasies of making sweet love to the sexpot, the way Penny was pulling her ass cheeks apart sent her mind to a new genre of porn she'd been increasingly attracted to - domination. What if she were to put her hands on Penny's tanned shoulders and force her to her knees to kiss what was between her butt cheeks? Or turn around and make Penny service her wet pussy...so very wet. The idea of dominating Penny that was suddenly planted in her head was going to be hard to weed out.

When Amy realized that her thoughts about her super wet pussy were based on reality, not fantasy, it snapped her out of her reverie as she suddenly worried about her friends noticing the weakness leaking out of her. If only she'd known she wasn't the only one.

Bernadette returned and took control. "Sit down, Amy, I have something for you."

Penny suspected she had brought a strap-on and was surprised to see just a pair of white nylons in her hand.

Penny stepped aside as Amy sat down, but Bernadette tossed one thigh high stocking to her and said, "Let's help Amy discover the joys of stockings."

Bernadette and Penny knelt before their virgin friend as Amy asked, "Joys of stockings?"

"I thought it was weird too," Penny said, as she rolled the stocking up to prepare it to be put on, "but Bernadette showed me the power of stockings."

"Power of stockings?" Amy repeated, trying to process all that was transpiring and her head in a bit of a fog.

"Yes. I hated pantyhose, but once she convinced me to try thigh high stockings I was hooked," Penny said, as she began to put the stocking on Amy's too-white leg. Bernadette should have chosen black. "They are so soft, so sexy and give quick easy access to Leonard when he wants to...."

"Wants to what?" The innocent and naive Amy asked, as both friends massaged the nylons up her legs.

"Flip up her dress and fuck her," Bernadette said plainly and wickedly.

"Bernadette!" Penny gasped, as her hand reached up her other friend's thigh.

"Is that not the answer?"

"Well, yes, but I'm sure Amy doesn't want to know about that."

"Well, I do have some questions," Amy said, as both girls finished putting these weird nylons on her legs. Figuring there was no better time than the present to ask questions that had been marinating in her mind for some time, Amy was going to force herself past her usual timidity.

"Look, she knows you and Leonard fuck," Bernadette bluntly said. Then, looking at Amy from her knees, "These nylons mean your man can bend you over the kitchen table, slide his hand under your dress at a movie theatre or you can lift up your dress and sit on his face."

"Oh my," Amy said, those wicked things so hot. What no one could see behind her conservative attire and shy exterior was the sexually frustrated, porn-watching woman with a growing collection of nasty fantasies. They'd gone from sucking a penis, to letting one come all over her face, to letting a woman splash her face, to recently turning the tables and coming all over the face of a woman she was dominating - usually Penny. Her friend's bold suggestions would fit easily into Amy's fantasy library.

"It's very practical," Bernadette said, as she rose from her knees and then sat back down in her original spot. "Now, feel the nylons."

"Um, okay," Amy said, moving her hands to the white nylons. "Oh my," she said, as she felt how silky soft they were, so different from the supermarket pantyhose she wore.

"It's important to spend money on your hosiery," Bernadette said, as if she'd read Amy's mind about buying cheap.

"They feel so soft," Amy said, feeling suddenly sexy in them.

Penny added, "The nylons have definitely helped my sex life."

"Yeah, they have," Bernadette said, her tone dripping with innuendo, looking directly at Penny.

"In truth, I've never had better sex or more orgasms than since Bernadette convinced me to wear them," Penny admitted, stretching her legs out to let Amy get a good look at hers.

"If I recall, I ordered you to wear them," Bernadette said, planting the seeds for a suddenly planned seduction and domination.

"Yes, I guess you did," Penny said, her cheeks getting a little red.

Amy sensed the curious undercurrents between her two friends, and it brought her envy to the surface... she was always the third wheel... the outsider. Maybe now was the time to change that. "On that note..." she said.

"Ask us anything," Bernadette said, "there are not going to be any more secrets between us."

Penny worried about what Bernadette was doing and its possible consequences, but she also knew she had no way of stopping it... their secret lesbian rendezvous and her submission to Bernadette was about to be outed.

Amy inhaled deeply but didn't speak as she looked at both her naked friends.

Penny, resigned to her fate, played along and encouraged Amy. "Go ahead, Amy, ask us anything you want."

"How often do you have sex?" Amy blurted out in her frustration at still being a virgin. The night's strange revelations, coupled with the odd comfort of being naked except for some sexy nylons in a sisterhood of naked, nylon-wearing women only served to flame that frustration.

"What kind?" the tricky Bernadette asked, having made Howard eat her pussy before he left... sitting on his face as opposed to letting him fuck her, as she'd implied earlier.

"What do you mean what kind?" Amy asked confused. Then, leaning forward, she said in a whisper, "Penetration?"

"What kind of penetration?" Bernadette asked, giving a sly smile to Penny while having fun perplexing her smart friend... smart in all ways but sex and social cues.

"Bernadette," Penny interjected, not wanting Amy to know that she and Bernadette had sex with each other often... although realizing she had no control over that secret being revealed. Sometimes oral, sometimes sex toys... behind Bernadette's sweet public exterior was a wild slut who made Penny look tame (which she definitely wasn't).

"What kind of penetration is there other than penis in vagina?" a bewildered Amy asked.

"Tongue, fingers, toys, bottle, brush, vegetables," Bernadette listed, all things that had been inserted in her pussy. "To list just a few, not to mention oral and anal."

Amy mentally kicked herself at her stupid comment, she'd certainly seen a lot more than penile-vaginal penetration in her porn research. But she'd also harboured a suspicion that those things only happened in porn, that 'real people' just had penis-in-vagina sex. But Bernadette was apparently telling her that porn-style sex did take place in regular homes.