How do you ask a girl to do it?

I thought birth control pills stop the implantation of the egg onto the uterine wall, therefore eliminating the chance of conception. :f6:
Someone correct me if I'm wrong.

There's always something that could happen, there's always that 1% chance that the body doesn't react to the hormones well. Like if the woman forgets to take her pill one day, that ups the chances of her being able to get pregnant. A woman CAN get pregnant even if she's on birth control but it's highly unlikely that she will IF she's using it correctly(taking it everyday).

At least take some form of responsibility if you're having sex.

QFT.. A lot of people have that mentality like "oh it's not going to happen to me, if it's just one time" or "I'll pull out if anything is going to happen"