When there's a stamp on it.
So he can tell if he's coming or going.
Me: "I like telling people to be quiet."
By hare (air) mail.
They thought she might have been slipped a woofie.
Because as they got on the boat to leave Italy, they were stamped on the head, "TO NY".
He heard that you have to stamp letters or the post office won't send them.
Fax.