I heard this story recently:

A well-meaning grandma offered some peanuts to her grandson's playmate;  she knew her grandson was allergic to them.  The grandson, however, thought she was offering him the offensive nuts.  With all the drama of a 3-year-old, he put his hands on his hips, looked incredulously at his grandma, and said, "You KNOW I'm awwergic to peanuts; are you trying to do me in???"