Here's your science for the day. This is very interesting. Human emotional response to robots increases as the robot is anthropomorphized. At a certain point, though, when the robot becomes too real, humans suddenly become repulsed but it. This is the Uncanny Valley.
[via Candleblog via Boing Boing]
I can kind of understand why some people might want to get a Reborn doll; if they aren't able to have kids of their own, but I imagine they'd end up hating the doll after a while. Get a cat or a dog or something that can love you back.