This happened when I was about 19 on a road trip.
Great site, I try to hit it at least once a week. Here's a story of my first time in college.
I had a bud when I first started college that liked to talk about masturbation a lot, but we never had done it in front of each other. We were roommates for a couple of years, and usually ended up doing it alone either in the shower or real late at night. He said that his cousin had taught him how to do it. I kind of figured that he wanted to jackoff with me, since he liked to talk about it so much, but it didn't happen until we went to the beach with a couple other guys. It was like two o'clock in the morning and he and I were in the back seat trying to sleep. The guys up front were brothers, and one was sleeping. He was the next one up to drive. Me and my bud tried to stretch out in the back seat of this guys old car we had borrowed, facing each other. He pulled an old blanket we had over us. He kept moving around a lot and dragging his foot over my crotch until I got a hardon, so I decided to return the favor since it felt so good. I guess the best part was that the guy driving didn't know anything was going on, and neither did his brother. That made it even more dangerous and fun. Feet changed to hands and we was taking turns rubbing each other thru our shorts. The next time it was my turn to feel him up, he had pulled his shorts down in the front and my hand rubbed across his hardon. It was the first dick besides my own that I had touched. I'm not gay, but I liked it, it was different, and so taboo to me it made it even hotter. We ended up jacking each other off under the old blanket. Up until that time I had never cum so hard. I guess it being my first time with another guy and the fact that if we got caught it would have been bad, made it that much better. After that first time, we jacked each other off about once a week until I transferred to another college. I'll never forget it.