Ass preparation

I have a question for any porn actress who does anal. How do you prepare your ass to be totally clean, so you can do ass to mouth without any risk? Thanks
the Forum
https://www.eurobabeindex.com/forum/
https://www.eurobabeindex.com/forum/viewtopic.php?f=4&t=6263
wikipedia(*) wrote:Lewin (2001) reports that "... consumption of fresh, warm camel feces has been recommended by Bedouins as a remedy for bacterial dysentery; its efficacy (probably attributable to the antibiotic subtilisin from Bacillus subtilis) was confirmed by German soldiers in Africa during World War II."
Xenomorgue wrote:Here is a clip, demonstrating nicely how a porn actress can assist a female colleague in the preparation for anal sex:
http://www.heaven666.org/up-to-the-elbow-anal-examination-2099.php