First kiss and "girlfriend" at 15. We made out for a couple of weeks, then I broke it off with her because I didn't love her (this was just before her prom [she was two years older than me]). I got to make out with a girl one year older than me a month after that, but only for a day.
When I was 16, my first GF and I got back together for a day because she wanted to give me a BJ... She wasn't very good, so I'm not even proud to call it my first.
Other than that, with them or with other people, I've hugged, tried eating out, fondled, and... yeah, that's it.