Bananas.

I was walking down the street early this evening carrying a banana peel. By way of explanation, I'd eaten the banana as I was walking, and was hoping that on the way to the bank and the supermarket I'd find somewhere to put it.

I heard a woman behind me say "excuse me" and I turned around. She was in, I'd guess, her 60s. Eccentrically dressed but not - at least at first glance - barking mad. "Yes?", I said, expecting she'd tell me that my shoelaces were undone. I get that a lot.

She pointed to my hand "can I have your banana peel?", she asked. Then, by way of explanation, she added "it's for the worms".

I handed it over and crossed the road in case she was, in fact, a nutter. And as I crossed the road I realised I'd missed my chance. My chance to say something like "Banana peel? My kids get worms and I usually give them those worm tablets you buy at the chemist".