Back in the day, you used to be able to buy thisd stuff called Spanish Fly. I heard that it would make girls just go crazy. They would get so horny that they would do 'anything', including stick shifts. Does anybody know if that is true?

It's partial truth. It is like a dirty form of X and many woman who were drugged with it died. It's the original date rape drug. They wouldn't be as sex crazed as the urban legend, that was a ploy to sell it to the desperate and sexless teen age boys. If your offered it don't take it. You could kill the girl and go to prison even if she lives.