Truman Capote to an unknown man
Truman Capote was an American author best known for his work 'Breakfast at Tiffany's'.
Anonymous man, after whipping out his private parts, asked the writer: "Since you're autographing things, why don't you autograph this?"
Capote: "I don't know if I can autograph it, but perhaps I can initial it."
Well you see, they were looking for witty retorts.