"Angel Babies" joke

This joke may seem racist to some. I just wanted to warn you of this before you read it.
Sally - Where does a baby go after he or she has passed away?
Joe - I don't know.
Sally - To heaven. What does the baby get after he or she arrives in heaven?
Joe - I don't know.
Sally - Wings. What is the baby called?
Joe - I don't know.
Sally - An Angel. Where does a black baby go after he or she has passed away?
Joe - I don't know.
Sally - To heaven. What does the baby get after he or she arrives in heaven?
Joe - I don't know.
Sally - Wings. What is the baby called?
Joe - A bat!