Enema play is one of My favorite forms of play. It is so versatile and can range from subtle to severe. It can be humiliating – or not. I have used enema play to clean out sissies for man pussy training. I have used them purely for torture – a little added pain during CBT, for example. I have used enemas to give the lowly, weak male an idea of what We Women go through monthly. Menstrual cramps are such a bitch and I think every man should have an idea of what they feel like. That would probably put an end to all the PMS jokes.
Enemas are also useful for degradation. Not being in control of your own bodily functions and/or having a Mistress present when you are finally allowed to relieve yourself can be a very debasing experience. As a slave, being able to endure an enema without soiling yourself and then presenting yourself to your Mistress cleaner and more humble than when you arrived, can be a sweet achievement.
So, although enemas do not have a place in every BDSM scene, they do have a place in specific types of scenes. I have seen lots of wary looks when the enema bag came out for the first time in session. Now a lot of those same subs look forward to the cleansing routine.