Research, dear Helen? A gentleman never tells. (and not )

(Do forgive me if real estate has kept me preoccupied of late. I've had a lot on my mind.)

Your question recalls the story where a gentleman at a cocktail party, after speaking with a young lady on an extremely friendly basis, noted his wife's acid stare. "Don't worry, dear," he assured her, "she's merely a professional acquaintance." "Really?" replied his wife, "Your profession, or hers?"