A:They both have a one-in-a-million chance of becoming a human being.
Because dogs can't whistle. (X-post from r/dadjokes)
About 1 in every 600 million has a chance of becoming a human.
Because ladies go in first.
Make him wear shoes.
I put on the wrong socks this morning.
A: So he can tell if he is coming or going.
Both have a one-in-a-million chance of becoming a human being.