I'm not really sure. Many reasons seem to contribute to it. My wife is hard-core Catholic. Her uncle fell apart mentally after losing his only daughter, so having extras is sort of a backup plan. Kids can be fun. Having kids is pretty much the meaning of life.

Ha, awesome!

Kids are super neat--it's just interesting seeing if that was from marrying into additional kids (have seen this with second and third marriage couples) or if they come from the marriage directly.

You may not have intended to come across this way, but I have heard comments similar to yours made to my parents (I have quite a few siblings) and they are offensive.

Think about what it: you're asking about someone's love life. It is no business of yours. So if you're going to ask a question like that, please be respectful. For example, say "If you don't mind my asking, why did you have so many kids?"