Self Busting - yea or nah / How do yo do it?

My wife and I are in an PFM/FLR where I am denied orgasms and ballbusting is used as both a reward, (for serving her needs, ie pleasuring her, massages, foot rubs, etc.) and punishment, (for having a small penis & PE). Basically, being hit, kicked, kneed, crushed is what we call sex for me.

Even though my wife busts me almost daily, I find that I like to hit myself as well. Early on, I built some contraptions for self busting, but lately I tend to just grab whatever is handy, for instance an empty metal drink tumbler, and give myself some whacks.

I'm just curious if others here are similar? And, if so, how do you do it? What really gets you going?