When they get there, St. Peter greets them and tells them, "We only have one rule here in heaven. Don't step on the ducks."
So, they enter heaven and sure enough, there are ducks all over the place.
It's almost impossible not to step on a duck there's so many, and though they try their utmost to avoid standing on them, the first guy soon accidentally steps on one.
St. Peter then appears with the ugliest woman the guy had ever seen.
St. Peter chains the woman to the guy and says to him, "Your punishment for stepping on a duck is to spend eternity...