Backwards Collar

Johnny is walking along and a priest is coming the other way. Johnny says:

- Hey, mister, why are you wearing your collar backwards?

The priest says:

- Because I'm a father.

Johnny says:

- Yeah? Well, my old man's got three kids and he don't wear his collar backwards.

The priest says:

- You don't understand, son. I have thousands of children.

Johnny says:

- You should wear your trousers backwards.