The doctor entered the room and advised

The doctor entered the room and advised his patient that a brain transplant was the only remedy.

“Fortunately” he continued, “this hospital has perfected the procedure, however, it is not yet available on the National Health and you will therefore have to pay.

We have two brains in stock at the moment, a female brain costing £30,000 and a male brain at £100,000”

“Why is the male brain so expensive?” asked the patient.

“Oh, that’s easy, male brains are hardly used.”