Telephone, telegraph, and tell-a-woman.
Nothing, because he is the one who knocks.
The sight of premature Ejack-o-lanterns in the neighborhood. I'm a Dad so this joke is OK
They both couldn't vote before 1920
The dishes, if she knows what's good for her!
Haremail.
Put the word 'gluten' at the beginning
Remorse code
Bell-bottoms!
A wedding ring !
Gmail
Telephone, telegraph, tell a woman.