A man goes to the doctor because he's had a terrible headache. The doctor says "Well I have some BAD news and some GOOD news....the BAD news is that you have a brain tumor...,the GOOD news is I can do a brain transplant. The man says"Doc whatever it takes, but how much is it going to cost?" The doctor says"I have 2 brains available. A man's brain which is $40,000 and a woman's brain which is $30,000. The man says"What is the difference?" The doctor says"All the womens brains I get have been used"