Father Porter's Boys

Three altar boys are standing in the snow with their pants down around their ankles. They have their penises in a snowbank.

Sister Margaret sticks her head out the window and says, "Boys! boys! Whatever are you doing? You're going to catch pnuemonia! Put your penises away!"

The tallest altar boy turns around and yells, "Sister Margaret, don't worry! We know what we're doing! Father Porter always likes a couple cold ones after work ...."