So - I used to work at pharmaceutical lab in cancer research. One of the women scientists was so SMART, but was also like a female Austin Powers (with the teeth and all). Every day, she would tell jokes, and one day she enacted this one - it was hilarious.
"A woman goes to the hospital, and her doctor gives her a sonogram. He sees the baby and suddenly the baby says, “Are you my daddy?” The doctor is shocked and goes to get another doctor, who looks at the sonogram. The baby says again, “Are you my daddy?” The doctor says, “No, I'm not your father.”
They go to get the dad, the father looks at his baby boy and the baby asked, “Are you my daddy?” And the father says, “Yes, I am!” So, the baby pops out of the mother's womb, picks up his hand, and starts poking the father in the head while saying, “How do you like that?! How do you like that?!”