I've noticed there are distinct types of women and men that try to talk you into having kids in a preachy way. Men will press on women, even women who are not their girlfriends, that we have to have children. These are also the same men who go by the rhetoric that women HAVE to be a certain way and men HAVE to be a certain way. My THEORY behind this is that these men are insecure deep-down and lay this down in a false pretense of "order", an order that they control. It is an ideal of control whether they realize it or not (because it's interesting to know many don't REALIZE the reason why they do this, they just do). Women who tend to do this are either ones who had children and are not happy with it and the whole thing with "misery loves company" kicks in. Other women who tend to this are the types who were either raised to believe they have to be that way, normally by either their father or rules enforced onto their mother by their father, or general notions they've picked up from friends or immediate society. In my mind, they're mentally compliant due to nurture.
And NOTE...because I know someone will either misread me or put words in my mouth, this is what I believe to be accurate regarding child-ZEALOTS, not people who have kids but do not force the notion that "everyone needs babies" on other people. It is also my opinion based on what I know to be true regarding psychology, and I'm clearly not an expert. I truly believe that anyone who pushes ANY idea, not just presenting the idea, is doing so out of insecurity, which in turn creates a control issue, and this just enforces that.