"I don't want cheese sandwich in my lunch," my daughter declares at breakfast, with a distressed look on her face.
I am surprised. She always has cheese; she likes cheese. She has never expressed a dislike of it in the past, although (unlike her brother, who hates the stuff and will only eat ham) she is usually willing to try other things.
"Oh?" I say. "Why not?"
"It makes me feel sick," and she rubs her tummy and leans forward with such pain and anguish that I am forced to believe it has truly upset her.
"Okay, do you want ham, like your brother?"
"No." (More stretching of face in agony.)
"No. I get a poorly tummy."
I am getting the picture. "So, what would you like in your sandwich?"
The face transforms instantly. She sits upright, a small smile on her face and a bright spark in her eyes.
"Chocolate spread, or honey!"