here are a few that I like
Knock knock.
Whos there?
Cow says.
Cow says who?
No, a cow says mooooo!
Knock knock.
Whos there?
Robin.
Robin who?
Robin you, now hand over the cash.
Knock knock.
Whos there?
Lettuce.
Lettuce who?
Lettuce in, its cold out here!
Knock knock.
Whos there?
Razor.
Razor who?
Razor hands, this is a stick up!
PS. some of them work wonders on tinder