Actually, I wouldn't mind renting one for like a week or so. I can't see myself being committed to one woman for the rest of my life right now, and a child growing up deserves a family with full time parents, in my book at least, so really I guess I'm just not ready.
Which brings me back to my rental theory. Hell they give you a short period of time when you can return most anything you aquire, why not a baby?
Take care,
~Chris