Mine was also at a school dance. I went to college when I was 15 as part of a special program. There was an entire dorm of us (30) at an all girls' college of about 800. Needless to say, dating oppotunities are few and far between. To make up for it, we often attended dances at a local boys' only military high school.
I had a friend at that school and he asked me to go to the Valentine's dance as his date, so I agreed. He knew that I hadn't ever really dated a guy and had never kissed anybody. We get to the dance and he doesn't really want to dance. We go outside the front doors to talk and he asks me to kiss him, knowing it's my first kiss. I told him ok, and he proceeded to slobber all over me worse than my dog. I didn't even kiss him back because I was in shock! He then asked me to kiss him in front of everybody on the dance floor (completely not my style!) I found out the only reason he wanted me to go out with him was so he could prove to the other guys that he kissed a girl! I promptly walked off and went to find my friends. I learned to never date boys at a military high school (well, that high school.) They were all a bit weird.