Societal pressures. If you have less than the standard 2 children (make sure one is a boy and one is a girl) you're selfish, not focused on family. If you have more than 2 you're pretty much contributing to overpopulation, an irresponsible breeding rabbit who can't keep her legs closed. I have 4, some of my friends have 1, others have 10 or 12. We're all judged but no one understands and really it's no one's business.