I have played many roles, mostly bottom, some top. I generally like the Punishment Enema scene with spanking included. Both are things I experienced when young and impressionable that are now big turn-ons. I have had the opportunity to play with some who were quite good at this. I play a boy, usually about 12 - 14, who has been caught eating forbidden junk food that makes me constipated. Since I am a repeat offender with poor eating habits, I get the works: Rectal temp., 2 glycerin suppositories, a hairbrush spanking, OTK bulb enemas, and finally a 2-quart bag of hot Ivory soapsuds.
I've also given an enema as therapy to a woman who set goals for daily water-drinking and then failed to meet them. Since she didn't drink the water, she got it up her heinie instead, along with a spanking for being naughty.