Girls were yucky until I was like 10 (ok, maybe not 10, but I know I was a little late to the game).
First gf - 13 - Jacky - a little ditsy, very cute, definitely not meant to be (little to ditsy for my tastes, but at the time - who was I to complain!!!)
Now when I was 15. . . lets just say that things got interesting . . .