It is safe to say that neither of us were getting regular sex, and certainly not enough to satisfy our 18-year-old sex drives. I didn't have a regular girl friend, but I had experienced a few occasional hook ups with willing females. He would spend the night with her about every six weeks when she would come up to visit. My roommate, Mark, had a girlfriend who was still in high school back home. It was a cold Saturday night winter term. The first time I ever masturbated with another person was my first year of college with my roommate.