WARNING: Even though I and a number of submissives have never experienced any long term health problems from Ivory Soap Buttplug Punishment, there is a possibility that this can be harmful. If you want to try what you are about to read, you do this at your own risk.
I like to carve bath size bars of Ivory Soap into buttplugs to use in CNC (Consensual Non-Consent) BDSM play.
Before inserting one in a naked, bound, and spread submissive's anus, I dip the plug in warm water. This has a lubricating effect, making insertion easier.
I insert the Ivory soap buttplug very slowly and withdraw it, I repeat this over and over, going just a little deeper with each insertion. After it's in all the way, I twist and turn it,leaving more Ivory soap in my slave's anus and rectum. The effect is an erotic, but burning-like sensation.
The best bondage position for administering Ivory Soap Buttplug Punishment is with the submissive bound spread-eagled naked, standing. Suspension style wrist cuffs are chained to eyebolts in my basement ceiling beams and her ankle cuffs are attached to a spreader bar, spreading her legs wide apart.
I fashion a buttplug harness out of nylon rope to prevent my submissive from expelling the Ivory Soap Buttplug.
It'a delightful to crop, paddle and cane a submissive's bare bottom while an Ivory Soap Buttlug is lodged in their anus and rectum. Each crop, paddle, or cane stroke makes their bare butt cheeks clench instinctively around the soap plug, making it sting their tender rear hole even more.
I always try things out before using them on submissives. The first time I tried an Ivory soap buttplug into my own anus, I came without any stimulation to my hard, wet cock.