Quote Originally Posted by wufwugy View Post
Food for thought: no human has two hearts.
Conjoined twins

Quote Originally Posted by wufwugy View Post
No human has two different genetic codes
Every mother carries genetic material and markers of every child she's carried.
Mothers of boys can test positive for male DNA - in rare cases of if you're specifically looking for it.

Quote Originally Posted by wufwugy View Post
Therefore...

therefore...