First kiss was 17, first sex was 18.
My first kiss was some random chick I met at my first drunken college party freshman year of college. I don't even remember her name, I think it was Amy.
My first sex was with a girl I dated for a few months at the end of my freshman year of college. First time was an awkward affair, second time the next morning was real good.
I was a late bloomer as well. I had plenty of shots in high school (and didn't realize it at the time), but I had absolutely no idea what I was doing with women and looking back on it now I probably could have banged five or six broads and just didn't capitalize on any of the opportunities I had.
To this day I can count the number of girls I've slept with on one hand, but I've been in a relationship for 4 years and having fantastic sex so I have no qualms about how I did things.

Logged
Pour the wine, hold the grind, quarter to nine, let's go.