A black guy, a white guy, and a Mexican all want to go out with this girl. The guys find out the the girls dad is the devil, so they ask him what they should do to be worthy of going out with his daughter.
The devil tells them all to take down their pants, so they do. The devil goes up to the white man and grabs his penis. The penis immidiatley melts and the guy runs away yelling.
The devil goes up to the Mexican man and grabs his penis. And like the other guys, it melts and he runs away yelling.
The devil now walks up to the black man and grabs his penis. Nothing happens. The devil looks up at the man in bewilderment. The black man replies, "Melts in your mouth, not in you hands!"