(A customer walks up to my register with her 2 year old sitting in the child seat of her cart.)

Customer: “I have these two coupons I’d like to use.”

Me: “I’m sorry, you can only use one coupon.”

Customer: “Okay, then I’ll buy this separately.”

(The customer separates a large pillar candle from her other purchases and puts one of the coupons on top.)

Me: “Actually, we can only take one coupon per customer per day.”

Customer: *completely serious* “I’m not buying it, she’s buying it!” *gestures to her 2 year old*