I too like to get an enema in preperation to anal sex. The obvious discomfort has already been stated but there are a few perks too.

While the enema is being administered, its a grand time to fondle the one receiving it, a little spanking, a little rubbing even a little buzzzzz from a favourite toy will make the experience much more pleasureable.

What's a little cramping in comparison to all the pleasure that is about to cummmm?

Its alllllllllll good.