What I count as my first kiss I had after my school's homecoming dance with my girlfriend when I was 15 or 16.
We were in the parking lot and I was saying goodbye and decided to try and kiss her and it was yay. But I was very timid and shy and she is much more open about relationship stuff so it was funny to her.
My other first kiss was with a crazy psycho chick a year or two before and I thus do not count it.