Author's note: In this alternate timeline, not much is different from the current world with one notable exception. A subset of males have evolved the ability to conceive and bear children (known as "fertility-capable men" in polite company, "breeders" in more common usage). A womb grows and connects to the rectum, leading to fertile periods not unlike those experienced by females.
***
Andy woke up the next morning wondering if his night with Chase had all been some sort of confusingly hot, breeding cycle induced dream. The dried cum on Andy's chest and going down the back of his thighs told him otherwise though. He saw he was alone in bed and worried what this meant for his friendship with Chase, let alone the roommate dynamic.
After considering different things he could say, Andy got out of bed to talk to Chase.
The shower was running in the bathroom they shared. Andy knocked and heard a faint voice say "come in" over the loud fan. Andy figured it may actually be the ideal setting for this conversation: the shower curtain was opaque so they didn't have to make eye contact or see each other's reactions.
Andy took a deep breath, "I think we need to talk about what happened last night."
Chase cleared his throat and began speaking but Andy cut him off: "no, just let me say my bit."
Andy continued, "It was a weird night, I know. But you were drunk and I was feeling a bit... I guess, off, and kinda lonely? And not that I'm gay or anything, I don't think it makes us gay, we just were fulfilling a need we both had. And I like to think we both enjoyed it, I know I did, so I don't have any regrets. I just don't want us to pretend it didn't happen and make things uncomfortable. You're a good friend and I don't want any awkwardness."
There was a few beats of silence, only the sound of the shower and fan audible, before the curtain was slightly pulled back. "The shower upstairs wasn't working," said Brian with some embarrassment, his freckled face emerging in the gap.
The blood drained from Andy's face and he bolted back to his room.
A minute or so later there was a soft knock on his door, following by Brian emerging, a towel wrapped around his waist but his hair and chest still damp from the shower.
"Can I come in?" he asked.
Andy nodded and leaned his head into his hands.
"So... uh... something happened last night between you and Chase?"
Andy nodded, "and I thought we could make it simpler by keeping it between us and moving past it, but I guess that plan is ruined."
Brian came and sat next to Andy on the bed, causing Andy's heart to skip a beat. "Oh god," Andy thought to himself.
"Look, I mean... we've all gotten drunk and banged someone who, in the light of day, was not exactly someone we would have otherwise chosen," Brian said, the sensitive nerd side that Andy admired emerging.
"Usually it's not your same-sex roommate," Andy offered in response.
"Well, I'd be lying if I said I never jerked off with another guy," Brian replied. Andy's mind was distracted by that thought for a moment. "But clearly that didn't change my life forever," he continued, his hand patting Andy's shoulder, sending a surge of energy rushing through Andy's body. The flushing heat was starting to course through Andy's veins again and Andy struggled to keep it in check.
"Brian," he said, gritting his teeth, "this wasn't jerking off. This was... intense, sheet gripping, pillow screaming, cum blasting fucking of my ass."
Andy looked over and, like it was the first time, noticed Brian's features. His soft, wavy red hair that still dripped a bit onto his freckly pale face. He had been a swimmer in high school and his physique was toned like Andy's but with more muscle mass from hours lifting. Brian's chest was smooth except for light hairs around his reddish nipples and a treasure trail of red hairs going down from his belly button.
Brian's swallowed hard, his soft brown eyes locking onto Andy's. A quick gaze down showed a growing tent under the towel. "Oh no, not again," said a quiet voice in Andy's head which was drowned out by a louder, physiological need.
"Brian you should probably leave now... " Andy started, but before he could say anything else Brian had thrown himself onto Andy, their lips hungrily meeting. Andy's hands explored Brian's strong, muscular back as Brian's tongue explored the inside of his mouth.
Andy let out as a series of moans as Brian grabbed his hair, pulling Andy's head back to kiss his neck. They continued like this, passionately making out until Brian whipped off the towel, revealing his throbbing, hard cock. Brian had a large, 8" cock that looked even bigger against Brian's 5'8" frame. At the base of his cock, Brian had neatly trimmed his strawberry blonde pubic hair.
Andy took Brian's cock in his hands, feeling the thick, long erection his ass desperately craved. Brian's cock began leaking precum, which Andy rubbed up and down the shaft.
Wasting no time, Brian lined his cock up at Andy's hole and pressed gently in. Andy grabbed onto the bed as Brian began to inch his way in. Chase's cock wasn't small when Andy took it last night, but Brian's cock was stretching Andy's hole to its limits. Waves of pain and pleasure passed through Andy's body, transitioning to pure pleasure as his body adjusted.
Once Brian had gotten all of his cock into Andy's eager ass, he tested the hole by slightly withdrawing and pushing back in. Andy moaned and Brian built up his pace, beginning to thrust and quickly escalating to an aggressive pounding that left Andy squirming with pleasure.
