Why do you clean out before bottoming? I do it out of respect for the man that is going to be inside of me. And that means his tongue..or his hard cock. We all know the natural function of that part of the body. Why wouldnt you want to be as clean as possible for someone that you want to be with? nothing weird about that, at all.
Deep enema's CAN be habit-forming, and the body can get to where it does rely upon them for bowel-movement, so a lighter, less invasive "flush and rinse" is preferrable, and takes care of matters that need attention for penetration.
Is there pain following anal sex? Sometimes, but it usually goes away after a brief period of time. Just remember...lot of foreplay, loosening up, a sex partner that listens to you and is willing to slow down..and a good, water-soluble lube that remains slippery, not sticky. My boyfriend and I have had really good luck with ID GLIDE.