This story hopefully has erotic appeal from the described situation; it doesn't have graphic narrations of sex. If that's what you're after, this story won't be for you.
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There are always complications when young people of the opposite sex try to live together, platonically. They have to set boundaries, handle privacy issues, and battle natural attractions. But it can be done... sometimes.
Sarah, a graduate student, lost her roommate who left to get a place with her boyfriend. Mark was in the same boat, as his roommate was the boyfriend in the departing love duo. Neither Mark nor Sarah could afford their place by themselves. The sudden departure of the lovebirds put them both in a bind. While they only knew each other slightly, because of whom their roommate was dating, they now shared a mutual predicament.
Sarah's place was convenient to the university where both attended and was a two bedroom. The quickest solution would be for Mark to give notice on his place and move into Sarah's apartment. One inconvenience was that it had only one bathroom. Each bedroom had a door accessing the shared bathroom. When using the facility, one would lock the opposite door, and unlock it upon exiting.
And so it was that Mark moved in. It seemed to go well. He and Sarah were sociable and afforded each other privacy. They were careful not to walk around the apartment undressed or even semi-dressed. A platonic, almost chaste, relationship was established. Then something happened. Here is their story, told in their own words.
Mark: Sarah and I are getting along fine. Wisely, we've avoided any sexualized situations. Not that she isn't an attractive woman. She has a great body that she usually hides in sweat clothes. But when she wears something more form fitting, they reveal full breasts and a rounded bottom. Very nice. As I said, we're not dating, but that doesn't mean one can't (discreetly) look. I look.
Sarah: Mark seems like a perfect roommate. He's not my type for dating, even though he's not bad looking, as we don't seem to have common interests (sorry, Mark). He's handy around the apartment, neat enough, for a guy, and is pleasant. He gives me my privacy, and hasn't complained about my cosmetics filling the bathroom cabinet. Happily, no boy-girl issues have presented themselves. We have a friendly, respectful relationship.
Mark: And then it happened. One evening before bed, I went into the shared bathroom. I just needed to pee, so it hardly seemed necessary to lock the other door - I was just going to be a few seconds. As I stood over the bowl, holding my penis out from pulled down pajama bottoms, the other door opened. Sarah walked in - and stopped, her eyes wide. "Oops, I'm sorry," she said. But she did not turn around.
We both froze. I, peeing into the bowl, her, watching.
"I forgot to lock the door," I said, "My fault."
"Your penis doesn't look normal," she said.
I didn't respond to that, and finished my task. Just in time, as I felt the organ began to slightly swell from the erotic excitement of her staring at me.
"Don't bother to flush; we can save some water," she said. And she lowered her pajamas and sat on the bowl. Her urine stream flowed into the bowl.
She got up, flushed, and walked out.
I hadn't seen much of her body, just flashes of her thighs and pubic hair as she got on and off the toilet, but the intimacy of what had just happened coursed through me. My penis rose from its thickened state into a full erection. I hastened back into my room before she might return and see me. I was struck by how comfortable she was in that potentially awkward situation.
Sarah: I went into the bathroom and there he was, his penis out, peeing into the toilet. He hadn't locked my door. He didn't move to hide himself. I guess he was okay with me standing there, observing him. Is he an exhibitionist? I hadn't picked up on that, but why didn't he hide himself?
I haven't seen that many penises in my life, but it's always a fascination. A strange apparatus, a built-in fire hose that changes shape. And I was struck that his looked different. I shouldn't have said anything, but it just blurted out. I immediately felt bad for saying he wasn't normal. Tactless, especially if he's got some medical issue. I wanted to pretend that what I saw was not a big deal, so I used the toilet too. It was a moment that couples probably share all the time. But we're not a couple. Maybe that was a mistake. Ugh, I hope he doesn't take this as a signal on my part. Two sexes living together platonically is awkward.
Mark: We ate breakfast together the next morning, as we usually do. We did not talk about the bathroom moment. There was the usual chitchat but it felt different. I viewed her differently.
Days after the 'incident' I couldn't stop reliving the sensation, of me with my penis out, her watching, her casually lowering her pajama bottoms to use the toilet. All very natural. Maybe she's just at ease with the human body? But I wanted to ask her, what did she feel? Was she excited by what had happened? And what about that comment about me not being normal?
Sarah: It's been days, and I can see a change in Mark. He looks at me more intently. I can feel his eyes undressing me. And, to be truthful, I sneak looks at him. There was something about his penis that wasn't normal. I need a closer look to be sure. But that's not going to happen; he won't forget to lock the door a second time.