As in the 'First Kiss'. My very first kiss was in second grade out on the playground inside the tire dragon. Just a peck on my cheek, and then he ran off. I forget the boy's name. That's pretty bad, I know, but I think he moved away that following summer. My first memorable kiss was with my best friend's brother. The first true open mouth, sloppy, wonderful yet awkward kiss. I can say I'll never forget that one!
Of course, there are other memorable kisses, but it's that first one with the first love that really counts.