Christians are all the result of Adam and Eve. God created nobody else that I find in the Bible.
That makes all of us the children of incest if their children begat children.
On the other hand, if you're and evolutionist then you believe we all came from a humanoid in Africa, and she being the only evidence found at that dated time must have mated with other animals to produce you making you the product of beastiality.
Either way you're pretty weird.
