Sam, from the garment center in New York, went to Miami Beach for a winter vacation. While walking down Collins Avenue, he was approached by a luscious blonde, who whispered into his ear, "I'm selling - are you buying?"
Sam said, "Sure, I'm buying."
So they went to a hotel room and made love all night.
A week or so later, when Sam went back to New York, he came down with syphilis. After weeks and weeks of painful treatment, Sam was released by the hospital.
As he was walking along Fifth Avenue, the same blonde came over to him and whispered, "I'm selling, mister - are you buying?"
Sam looked her straight in the eye and asked, "So what are you selling now, cancer?"