loving on the lawn

　　A man was walking one day, when he came to this big house in a nice neighbourhood.

　　Suddenly he realised there was a couple making love out on the lawn. Then he noticed another couple over behind a tree. Then another couple behind some bushes by the house.

　　He walked up to the door of the house, and knocked. A well dressed woman answered the door, and the man asked what kind of a place this was.

　　"This is a brothel", replied the madam.

　　"Well, what's all this out on the lawn" queried the man.

　　"Oh, we're having a yard sale today."