Rebecca and I were on our way along the river bank when I pointed to a patch of vegetation and asked "Do you know what those are?"

She said "No."

"Those are nettles. We call them stinging nettles. If you touch them you will hurt your hand."

She nodded. I carried on walking.

A few seconds later I heard a high pitched squeal from behind me. Sure enough there she was nursing her hand and complaining that she "won’t try that again."