Dr. Frankenstein sent his faithful assistant, Igor to the brain store. Before him were rows and rows of disembodied brains in specimen jars.
When Igor inquired about the cost, the proprietor explained that the male brains were $500 while the female brains were $200.
“Master would like a male brain for his new creation,” explained Igor.
“Very good,” said the proprietor as he packaged up one of the brains and rang up the sale.
“Before I go,” Igor inquired, “why are the female brains so much cheaper?”
As the owner closed the till, he replied, “Because they’re used.”