Ok, well time for some real world advice now. My ex gf was on birth control, the IUD. Being the safe guy I was, I always pulled out anyways. Guess what, she got pregnant and it was the biggest fycking scare of my life. Apparently the IUD dislodged itself. No birth control is 100%. If it happened to me, it could happen to you.
Know what I did after she got the abortion? I forced her to get the depo shot, made sure I was in the room when she got it and saw the nurse withdraw from the vial and straight into her hip. I also wear condoms now and pull out. After which I fill up the condom with water from the tap to check for any leaks. Then flush the fvcker down the drain. Wash my hands and penis so there's no residual come anywhere, then put my pants on. Sound extreme? Maybe so, but it's a lot better than going through the month of hell that I went through when I had to deal with an irrational, pregnant girlfriend whom I had to coerce into having an abortion.
There's my new formula for avoiding minime's: Depo shot, condom on, AND pull out(with condom still on of course).