my first experience @ 18 had my g/f at the time preggers within a month... thats when she decided to go on birth control... and why i'm pro choice
never had an experience w/ an STD, but then again I'm probably annoyingly selective of whom i graciously stick my member in. I also give the girl a physical before hand and use a rubber. Most of the people i've had sex with I've known well before hand, so I'd trust them, on our friendship, to be honest about having an STD... and again, always use a rubber.