Back in the Good Old Days, when Dudley Fudpucker was whooping it up in college, he was standing at a bar one evening, when a lady of enticing appearance approached him and suggested that they have a drink.
Dudley said, "Well, I'm no John D. Rockefeller, but I'll buy."
After developing a slight buzz, she suggested a dance.
Dudley smiled and said, "I'm no Fred Astaire, but I'll give it a whirl."
Later, she suggested that they go up to her room. "I'm no Cary Grant," replied Dudley, "but I'll follow you up there." They leave and go to the lady's apartment. They have another drink, then do what had been on their minds all evening, anyway.
Afterward, the lady says, "What about some money?"
Dudley shot back, "Well, I'm no gigolo, but I'll take it!"