Every time an American Indian of a large tribe walks into the chief’s teepee he sees that the chief is masturbating.
They finally realize this is a serious problem, so they fix him up with a nice woman, and she starts living with him in his teepee.
One day, one of the tribe walks into to chief’s teepee and there’s the chief masturbating again.
He says, “Chief, what are you doing? We fix you up with a beautiful woman.”
The chief says, “Her arm get tired.”