Walked in on my roommate jerking himself off, while wearing his jock.  Waited a few minutes before I cleared my throat and announced my presence in the room. Just needed to collect the memory of his ass cheeks clenching while he pulled his meat. Added it to my personal spank bank.

As a special bonus, when he heard me clear my throat, he jumped and spun around.  I got to see my roommate’s thick ten inch cock, before he tucked it back into the pouch of his stretched out jock. He sputtered an apology, as he embarrassingly looked around for his shorts. I told him not to worry about it, we all masturbated, no reason to be ashamed about it. Told him that I stroked myself whenever I was alone in the room. I dropped my shorts and asked if he wanted to finish.  He was shy, but horny since he was interrupted mid stroke and needed badly to empty his full balls.  As with most males, horniness won out and we ended up laying on our respective beds and jerking off. It was a little awkward, but we got past the weirdness and eventually got into our private fantasies and managed to cum. After that we were much more relaxed with each other and comfortable with our nudity.

He was straight, and had no clue that I wasn’t, so it never went any further, but I got to watch him jerk his cock on a regular basis.