I don't know if some haven't actually REALLY thought about the reality of having a baby.
It definitely seems like that with some people. I'm having those issues with DH atm. Some days I feel like he loves the idea of having children, but the reality of it is just not really what he bargained for. He can be so impatient with DD just because she isn't quiet so he can listen to some TV show.

And yes, I have been told at 4 months: It's about time you weaned so you can get your life back. What the???? I don't want my life back. I made a decision to have children and I knew full well that it is going to change my life. Isn't that the point? And how is weaning going to get me my life back anyway?

Saša