Vampire bat

A vampire bat came flapping in from the night, face all covered in
fresh blood and parked himself on the roof of the cave to get some
sleep.

Pretty soon all the other bats smelled the blood and began hassling
him about where he got it. He told them to p**s off and let him get
some sleep, but they persisted until he finally gave in.

"OK, follow me," he said and flew out of the cave with hundreds of
excited bats behind him.

Down through a valley they went, across a river and into a huge
forest. Finally he slowed down and all the other bats milled round
him, tongues hanging out for blood.

"Do you see that large oak tree over there?" he asked. "YES, YES,
YES!!!" the bats all screamed in a frenzy.

"Good for you!" said the bat,

"Because I f**king didn't."