I was showering off after practice, and one guy was talking about what he was going to do to his girlfriend, I hadn't masturbated in a while so I was horny and got a boner. Someone shouted "HEY LOOK, THAT FAG'S GOT A BONER" and snapped my butt with a towel. My first reaction was, naturally, to thrust my hips forward, but unfortunately my friend was bending over to pick up something, and his butthole must have been all soaped up, because my dick kind of slid in. We fell over, and I was trying to push him off while he was trying to get up, and for a few seconds it looked like I was having sex with him. I ran out in embarrassment, and now I want to know what I should tell my girlfriend before the rumors start. Help?
