I know how many I want. I can safely assume that the woman I marry will want the same (maybe four). How can I assume this? Because if she doesn't want the same things in life that I do how could we be compatible enough to marry.
Would you think it strange if I said that the woman I marry will be a Christian? No you probably wouldn't because a Christian is forbidden from marrying a non-Christian and I'm a Christian. Would you think it strange if I said I wanted to marry someone who wanted to live where I live (same state and county area)? Probably not (How could someone who wanted to live in the midwest ever be happy with someone who wanted to live in California. One would always be unhappy). So why is it strange to say I'll have three more kids when I know the woman will want three more kids.
The posts of most women seem to imply that marriage is a crap shoot and you're kind of stuck with who you get. I don't agree with that at all. You find out what you want and then you find someone who wants the same. That's what courtship is about. Making sure you want the same things and that you are compatible.
What if she's Christian, compatible, demographically desirable, wants three children..... and can't get pregnant?