I think his (somewhat mangled) point is that pretty much everyone in their early 20's doesn't want to have kids, yet most people in their 30's are at least open to the idea.

He's basically playing the odds, but like I said, mangled his comment.

"Whow, are you arrogant. Can you even contemplate somebody who doesn't want to have children?"

Can you contemplate that if you are having heterosexual/breeder sex, you may have children even if you never planned to?