A blond, a brunette and a red head go to a party. The cops come to raid the party, so the three girls jump into potato sacks.

The cops come to the potatoe sack with the brunette, they kick it and she says "woof" so, they say, oh it's just a dog.

They go to the one with the red head in it, they kick it and she says "meow" they say, oh it's just a cat.

They go to the blonde and kick it she says "potato"