Maybe you should substitue the 'eye for an eye' analogy (eye for an eye, tooth for a tooth? Pretty soon the whole world would be blind and toothless) and put in 'burnt hand teaches best'.

When Limpit was small, she often did things that were dangerous, so I would tell her no. If she continued to do them and ignored me, I let her carry it through. Pretty soon she learnt that if she banged her head on the concrete floor on purpose, it was going to hurt her, so she stopped doing it.

LTS