18, my first month of college to be exact. I almost got raped by a horny chick when I was 15, but 1) I didn't find her attractive, and 2) it was at a church retreat. I just didn't feel right fucking a girl at a church retreat. Looking back on it now I wish I had.
17, and it sucked. She did the ol' starfish. Not to mention the fact that the condom totally killed all sensation, so the combination of her lifelessness and the condom resulted in me not even being able to finish. I just pounded away for a half hour or so and got tired.