If you're a normal human being, it's actually a lot of work (or an outpatient surgery, for me) to not have kids.

Using a condom is hardly comparable to having a kid (in work, implications, responsibility -- ie "decision)

Forethought in the heat of the moment is pretty hard.

If it wasn't, I'm sure people would have a lot fewer kids.

After 10 years of perfect condom use, you have more than a 25% chance of getting pregnant.

I'm going to refrain from doing the math backwards to find out how often you have sex.

You are confusing how hard it is to push a rock back up a hill with how hard it is to push the rock down a hill.