One of the late great B B King's favorite jokes to tell onstage.
By his own admission, B.B. loved the ladies, in his younger years he had many ladies in his life. One gal entered his life, fell hard for him, and decided to do something special for B.B., hoping to be his chosen gal. She went down to the tattoo parlor, Had a big ole B tattooed on her butt, one on each cheek. B.B. came home that night and was undressing in the bedroom. As he was sitting on the bed, pulling on his slippers, the gal stood in front of him, pulled down her panties, bent over in front of him, and says "What do you think of this, B.B.?" BB replied "Who's Bob?"