I worked in a boutique toy store once where a long-time customer ARGUED with a fellow S.A. (who was very self-conscious about her weight) over whether the S.A. was pregnant! As in:
Woman: Oh my, dear, when are you expecting?
SA: I'm not.
Woman: Oh, now don't be shy!
SA (through gritted teeth): I'm NOT pregnant.
Woman: What are you, four or five months along?
At this point our male manager chimed in with "Can I help you find something, Mrs. Duda?" Yes, her last name was Duda.
NIGHTMARE!