You know, I haven't told a lot of people this, and telling it to an entire internet forum is against my better judgement, but I have say something against Zeltar here:
I thought, like he did, that condoms were safe, and that they would allow me to have sex without any repercussions. Then, I meet this girl, and we hit it off, and suddenly things got sexual. I was 14 at the time. And, to be blunt, we did it. Protected. We weren't dating at that time. Six months later, she tells me she's pregnant, and is due in about three months. That scared the shit out of me. She swore that I wasn't the father. Swore. But to this day, more than five years later, I don't believe her. And she hasn't pushed the issue, but I'm not sure I should. I can't be a father right now.
tl;dr if you think it's 100% safe, THINK AGAIN