If you were a bottom and had a messy backdoor, you better believe that any top you pulled that shit (pun) on would be down at the gay bar immediately handing out flyers about your ass (pun again).
Cleaning back there is relatively easy. However, the big danger for tops are those people with never ending piles. Man, there is absolutely nothing worse than prying open ass cheeks and seeing what looks like a raw Arby's roast beef sandwich lurking back there.
From the way you would be jumping around screaming and flailing your arms to get away, someone would think you were a meth addict and thought spiders were crawling out of your skin.