Danny Williams mother was quoted as saying that when she confronted Bill Clinton with the claim that he was her kid, he laughed and said he couldn’t be because he’d had mumps when he was a boy and so he was sterile.
That would explain why Chelsea looks like Webb Hubbel.
I thought it was because the bent one had had a bad case of syphilis that caused him to be sterile.
Of course, he could have become sterile after conceiving Danny.