Not a bad joke.

Little Nancy was in the garden filling up a hole in the dirt,
When her neighbor peered over the fence. Interested in what the youngster was up to, he politely asked, "What are you
doing there, Nancy?"

"My goldfish died," replied Nancy tearfully without
looking up, "and I've just buried him."

The neighbor was very concerned. "That's an awfully big hole for a
goldfish, isn't it?"

Nancy patted down the last heap of dirt then replied,
"That's because he's inside your F***ing cat."