Spanking, cropping, flogging and whipping are fun - and my girl enjoys them - along with various other forms of pain induction - none of those are used in punishment (counterproductive in my opinion)... I hate to say it, but I've never had to punish my girl for transgressions - she just doesn't disobey unless there is a valid reason - and if she has had to disobey for a valid reason she 'fesses up immediately.

We have had misunderstandings - where she misunderstood an instruction - but I don't hold her guilty for not being a mind-reader.

So rather than looking for punishment reasons - perhaps punishment rewards are the answer? They work for us in r/t.