As You Would Have Them Do Unto You

She was studying for molecular neuroscience when they started. Her dormitory was one of single rooms, but her next door neighbour never seemed to be troubled by sharing a twin bed with whatever girl he was screwing that week. You'd think that the builders would have thought about the possibility of college students being loud, at least, if not necessarily about them being loud during sex. It was maddening because, though his bedroom was a proverbial revolving door of fuck buddies, his escapades never failed to make her incredibly horny.

The chicken wire structure of 5-hydroxytryptophan swam out of focus as she heard a girl's loud moan. The sound went straight to her clit, sending a wave of arousal throughout her abdomen. She read, in some very distant part of her mind, that 5-HT was catalysed by AADC, which stood for aromatic amino acid something-or-other, but she was no longer paying attention. She closed her text as the girl moaned again.

There was a vague thumping, just audible through the drywall, but she knew it would get louder shortly. It was almost funny, in a way. She didn't really know the guy who lived in the room next to hers, and she didn't really like him, but she sure as hell knew about his sex life. She knew exactly what it sounded like when he fucked a new girl, as well as one who he'd been with before. She knew the sound he made when he came.

At first she'd been embarrassed, unintentionally eavesdropping on his privacy, but not long after the start of semester, probably after the first time she'd masturbated to the sounds from next-door, her embarrassment was replaced with curiosity. He had a poor enough personality and an active enough sex life that he must be really great--or at least better than average--in bed.

She'd been sitting against her headboard, reading, in underwear and an over-sized white oxford that had belonged to her ex. Now, she slid down on the sheets, her fingers lifting the hem of the shirt and slipping off her cotton briefs.

The girl in his room shrieked lustily and he grunted. They were all screamers. She'd sometimes wondered if it was some kind of requisite. That he'd only fuck the girls who cried and begged for it. She'd never once felt the need to exclaim at any of her partners' sexual prowess.

Her fingers moved busily on her clit, teasing the nub, swirling down to circle her entrance, pick up some of her juices and return. Counter-clockwise, down, back, dragging her fingernail over the peak, then pressing hard with the pad of her finger.

The thumping increased, and the girl across the wall began panting, the occasional slick of a condom sliding out of her vagina breaking through her cries. There was a sharp crack of flesh meeting flesh, and she imagined that he'd delivered a well placed smack to the girl's backside. The girl screamed once, then resumed her exclamations of pleasure. Another slap and she groaned, then there was a particularly loud thump and she squealed.

Horny as hell, she fumbled in the nightstand for a dildo as the girl next door's cries crescendoed. The sound of his balls hitting her ass was became loud through the wall, and the girl's noise continuous. How big must his cock be to elicit such ecstacy?

Her hand closed around the toy and she brought it straight to her pussy, plunging it between her dripping folds. As she did, her neighbour gave a guttural groan, and the muscles of her vagina clenched around the intruding shaft. She imagined that it was his cock: hot, and hard.

She matched his rhythmic thumping with every pump of the dildo, furiously working her clit as the squelch of sex from next door blended with his lover's screams. The girl called out to God, and across the wall she heard his breathing become ragged. Slap, slap, thump, his sac, probably wet with the girl's moisture, his cock, glistening with it.

Their fucking became faster, more frenzied, and she slipped the large dildo in and out of her cunt, pistoning in time to each slurp of the other girl's stretched hole swallowing his penis. Her fingers slipped off her clit, and she readjusted her position, then resumed her rapid self-penetration.

The girl seemed, now, to be trying to say 'oh God', but never really made it past the first syllable, because at that moment their fucking stopped, or at least slowed until it was no longer audible, and her neighbour panted in the way she knew meant he was climaxing. His lover's scream cut off with a squeak as her vocal chords refused to vibrate any faster.

She drove the toy into her pussy one last time and roughly pressed her clit as she listened to the ragged panting coming through the wall, bringing herself to a shattering orgasm. Well, if nothing else, she could thank her neighbour for her increased levels of oxytocin.