"Show Me Yours" joke

In a train compartment, there were 3 men and a ravishing young girl. The four passengers joined in conversation, which very soon turns to get erotic.

Suddenly, the young girl proposes, "If each of you give me $1. 00, I will show you my legs." The men, charmed by this young girl, all pulled a buck out of their wallet.

The girl then pulled her dress a bit to show her legs to them.

Now she says, "If each of you gentlemen give me $10. 00, I'll show you my thighs," and men being what they are, they all pulled out a ten dollar bill. The girl pulls up her dress all the way to her legs in full.

Conversation continues, and the men, a bit excited, have all taken off their coats.

Then the young girl says, "If you will give me $100, I will show you where I was operated on for appendicitis."

All three fork over the money. The girl then turned to the window and points outside at a building they're passing. "See there in the distance. That's the hospital where I had it done!"