"Brain Tumor" joke

A man went to the doctor's. The doctor came in and said, "Well, I've
got some good news and some bad news."
The patient sighed, "Okay, give me the bad news first."
"The bad news is that you have an inoperable brain tumor."
The patient looked very grave, and asked, "And what are the good news,
anything to help me with the brain tumor?"
"The good news is our hospital has just been certified to do brain
transplants and there has been an accident right out front and a young
couple was killed and you can have which ever brain you like. The
man's brain is $100,000.00 and the woman's brain is $30,000.00."
"I'm glad to hear there's something you can do to help me," the man
replied, "But, out of curiousity, why is there such a big difference
in the price of male and female brain?"
The doctor replied, "The female brain is used."