This is the most detailed and anatomically "scientific" amateur instructional video ever produced on how to correctly use an enema/douche. Hopefully this 20 minute video will answer all the million dollar awkward questions on how to prep for anal sex that newbies keep asking. Warning: video is "adult content" don't watch it at work, watch it in private.
How to clean your Ass (Arsch spülen) - XTube Porn Video - fffrankk
P.S. Don't thank me. Thank the German dude that made it.