Enema - yes or no?

Strange question, but it was an even stranger topic of conversation last night. Me n a group of mates, male and female, were discussing anal sex. And of course one bloke came up with the 'yuck, you might get some brown stuff on you manhood'! Doh, surely that's a no brainer - seeing as where you are putting it LOL Anyway, this got us onto the topic of enema's and/or anal douche. Does it work, does it make it more enjoyable, more hygienic, or not important. Split the group. All, bar the one, accepted the possibility of some mess as expected - in the ass, expect some mess. And a small price to pay for the sensual enjoyment! Few say it has got to be done, just out of courtesy for the one doing the ploughing, couple said makes it more fun, rest didn't care either way.