Some very interesting comments. It's good to see more people rely on more than toilet paper and bring along wipes or take showers after release of solid waste.
Now, here are some other ass hygiene topics most people don't like to discuss or acknowledge but they have to be brought up.
Thongs - The -idea- of thongs (underwear, not footwear) can be sexy and provocative, but seriously, if the average person ONLY relies on toilet paper to clean their ass on a day-to-day basis, how sexy are thongs in reality? Thong wedges and strings go deep within the ass crack as one walks around, sits and bends in many positions. Throughout the day, one is bound to take 1-2 shits at least, so how clean will that thong string be as the day moves along? Thongs essentially become actual butt crack floss, which again isn't sexy. They are bound to collect any leftover residue or butt gunk. This is why I've never found them that appealing as an idea...not unless someone is washing after each release and changing thongs at least twice a day.
Big asses - and this is certainly not meant with any disrespect if someone has a very large ass. But for women, I definitely wonder if with a very well-endowed ass, does it become very difficult to reach around and clean thoroughly with tissue? Most women with big asses will -never- admit this or talk about it because it makes having a big ass suddenly look nasty or unappealing, but it must be true that there have to be specialized and strict beauty/cleaning regimens for those with big asses, in order to stay extra clean. Showers or rinses being a must. Because let's face it, it's got to be more difficult to clean back there than it is for someone with a much smaller or flatter ass.
Shaving/Waxing - Another reality here. The more ass hair one has, the more one will have to make sure they clean well. Hair is meant to grab and trap particles...especially gunky or viscous materials, and fecal matter is ideal in texture, even with very dry stools. I would say in this regard, men have it worst and must be even more practical and vigilant about ass hygiene than women. I would even say maybe it is best for men to look into trimming or waxing back there to make things easier, more sanitary, but I'd imagine ass waxing is not a pleasant experience and it probably has to be done way too often.
When children are potty trained, I don't think most parents really educate on rectal hygiene but rather obvious genital hygiene, face and overall body. Just the use of tissue is taught to most kids or young children. I am pretty sure young girls and women leave skid marks in their underwear from time to time, but we have to admit that this joke is often more associated with men. Why is that?
This has to be related to more hair in the back, as well as the reality that perhaps to have a really clean ass or to go about ways making sure that it is clean, is seen as a feminine or girly thing to do in North American culture? Too "metrosexual"? Hell, I remember a friend that once told me, "I have MAN's ass, no enemas and wipes for me! That's girly shit!"
Most fathers (and mothers to a degree) aren't going to sit down with their young sons and talk about rectal hygiene along with others proper ways to take care of the male self. It sounds "unmanly" and odd. "Those things just aren't discussed around here."
That's definitely a problem.
And so far, I haven't experienced a large wave of butt odor wafting up from anonymous asses upon movie attendants standing up to evacuate a theatre. LOL.
the only way it would become more difficult is if i had t-rex arms. my ass is huge, my arms are a normal length. its not rocket science. 
