discipline

Abuse that (usually) isn't intended for fun but rather to teach a yukkuri to not do something bad.
Done by an anon to his/her pet yukkuri or by a parent to it's ko.

Discipline is done with the intention of teaching the yukkuri a lesson. If the abuser has no intention of teaching anything and is abusing as payback for it's crimes with no intention to forgive it, use punishment instead.