He sat down behind me. I didn't think much of it. My girlfriend's brother was obviously gay although no one had ever seen him with another man. She was Asian, tall, slender, and hot. He was the male version of her but she had really gotten the good looks.
He was very touch feely and I'm on the gay friendly side so he didn't bother me. I was spread out on the sofa, legs across my girlfriends lap, head in the middle of the sofa on a pillow. There was just enough room for him to squeeze in behind me and he did just that.
We sat watching a reality show while the two of them chit chatted. They lived together and were very close. As we watched the latest wanna be talent on the television. After a while I noticed his warmth while I sat there with my hands behind my head. My girlfriend had a blanket partially on me and her and she had her hands casually in my crotch.
It was just enough to give me a little hard on and she noticed after some time and gently rubbed me until I had a full erection. I sat there with my eyes half closed for a time enjoying the sensation and half watching the TV when her boyfriend began to fidget.
I had my hands behind my head and I could feel his legs when he shifted over to one side and I thought I felt something hard brush up against me. I'd never touch a man before but I had thought about it and although my first instinct was to flinch away I stayed where I was and let him shift.
I sat there thinking, "That is a penis". I wondered if I should move but my girlfriend was still gently stroking me through my shorts and he hadn't moved so I decided to stay where I was. He was not fully hard when this first started but as I laid there no longer focusing on the TV it was obvious he was getting harder.
I was totally confused at this point but his erection was getting harder against my hands and neither of us was moving so I decided to gently rub the back of my hand along his erection. He was hard as a rock at this point and it was obvious he knew what I was doing.
At this point the three of us were totally quiet. No one acknowledging what was going on. The TV going on and ignoring our clandestine touching. After a while he started to playfully run his hands on my chest. I had a hairy chest and he being Asian and bare chested I think he was fascinated by it. I made a joke about it and my girlfriend pretended to be jealous and the two of them began playing with my chest.
As they ran their hands through my hairy curls they pulled my shirt open, unbuttoning it all the way and teased about how soft it was. He made a joke about me being hairy all over and stuck his hands down the front of my pants just a few inches. Normally he would not have found anything but my girlfriend had been rubbing me most of this time and I was hard as a rock. He just slipped in under the bottom of my erect penis and it was obvious he felt something.