That part of the body, like your mouth, has features that greatly reduce the chance of infection because they are the entry and exit points for foreign objects or waste. It is complicated how it all works, but in short your body really needs those parts to bot get infected, so it adapted ways to keep that from happening.
That was the explanation I got from the doc when mine first showed up.
I’d hate my rectum to become bot infected.
I am not qualified to answer this, but I did once see a similar question asked on Reddit. The best response I saw was from a commenter whose name I can’t remember, else I would credit them.
That commenter said that his infant daughter had required an operation on her rectum. The commenter asked the surgeon how the surgery site could possibly not become infected and was told “the asshole knows how to handle shit.”
That answer seemed reasonable to me and I probably will never forget it.
This is a genuine question I’ve wondered about a lot. Kudos for oddly realistic originality.
kind of unrelated, but hemorrhoids are only common because something like 95% of people don’t eat the (already low) recommended amount of fiber. eat lots of fiber, people.