Pay by the Inch

A Scotsman, Englishman and Irishman went to the Brothel. The Scotsman asks "How much does it cost?" and the madam says "You pay by the inch"

So the Englishman goes first, and when he returns his friends ask how much it costs. "Eighty dollars", is his reply.

The Scotsman goes next, and when he returns he is asked the same question. "One hundred dollars" he says.

The Irishman goes last, and obviously his friends ask him how much he had to pay. "Ten dollars" he replies.

His pals ask why it was so cheap....

"I paid on the way out!"