Me: Stop eating the eggshell.
Her: But I like the eggshell.
Me: No you don’t, you’re only doing it to annoy me.
Her: No, I’m not.
Me: Yes, you are.
Her: Are we at the pantomime?
Me (trying another tack): Do you know where eggs come from?
Her: Where?
Me: A hen’s bottom.
Her: But wee and poo come out of bottoms.
Me: Also eggs. From hen’s bottoms.
Her (looking dubiously at eggshell): I’m not convinced.