When I was a little boy in grade school the teacher — I don’t remember the subject — gave as an example of horrible cruelty the little-boy practice of pulling the wings off a fly.

I had never thought to do so, and I puzzled over the suggestion that it was somehow more cruel than slapping one flat with a fly swatter. So I swooped one up in my hand (a skill I often practiced in school and church), and pulled its wings off.