"If I ask you something that you don't know, you owe me $5. The same goes if you ask me something I don't know."

The blonde refused.

"Okay. If you don't know an answer, you pay me $5, but if I don't know an answer, I pay you $50."

The blonde accepted. The Lawyer went first.

"What is the distance from the earth to the moon?"

The blonde didn't say anything, but merely reached into her purse, pulled out a $5 bill and handed it to the lawyer. Then it was her turn.

"What has four legs going up a hill, but only three coming down?"

The lawyer had no idea, so he gave her a $50 bill.

"So, what is it?"

The blonde said nothing, but merely reached into her purse and gave a $5 bill to the lawyer.