A tap on the hand /paw stops a child/puppy eating stones.
Honestly, you can't beat your kids. But you can't leave them go feral for lack of boundaries either.
When 'No, Tarquin, please don't poke your baby sister in the eye again' doesn't work, or 'that tiny pebble will do your digestive system no good at all, darling' has zero effect, tell me why a quick seat of the hand is going to land me in jail?
Loose boundaries land kids in jail. (thread title right there)