Carol was a prostitute, but she didn't want her grandma to know.One day, the police raided a sex party at a hotel and arrested a whole group of prostitutes, Carol among them.
The police took them outside and had all the prostitutes line up Along the driveway when suddenly, Carol's grandma came by and saw her granddaughter standing in line.
Grandma asked, "Why are you standing in line here, dear?"
Not willing to let her grandmother know the truth, Carol told her grandmother that the policemen were there passing out free oranges and she was just lining up for some.
"Why, that's awfully nice of them. I think I'll get some for myself," and she proceeded to the back of the line.
A policeman was going down the line asking for information from all of the prostitutes. When he got to Grandma, he was bewildered and exclaimed, "Wow, still going at it at your age? How do you do it?"
"I just take my dentures out, rip the skin back and suck them dry."
The policeman fainted.