When I was 16 I was dating my first girlfriend. It was rather serious. We had been dating for a few months when me and my best friend who is a guy were hanging out. We were smoking and a bit high when we put on Girls Gone Wild. It wasnt unusual for us to watch porn together but we mostly made fun of and it never turned sexual. I cant remember details but I ended up giving him a handjob. I remember it was under the covers and I dont even know how or why it happened. I have identified myself as a lesbian since I was 15 but somehow I was giving sexual favors to my friend. Part of me liked it but my friend was sort of small all around so it wasnt turning me on really. I remember stopping after probably 3 or 4 minutes and going to the bathroom to wash my hands and leaving and we never really spoke about it. When I got home I masturbated to the thought of it but I felt dirty. My girlfriend picked up after that and I never told her. When anyone asks me if I have ever cheated I still say 'No'.