Thats nasty, licking booty hole is a good way to get hepatitis and its only for a person to crap not lick, disgusting.
How old are you? lol
Booty hole?
I don't think anyone's advocating running around eating random ass. Obviously, if you know your partner is clean, eating ass is an intense turn on for a lot of people (myself included).
I even have a little way of teaching someone to eat ass. Spread some ice cream topping in your ass crack, and have your partner eat it out. Not syrup or anything runny, but ice cream topping. It is very thick and it takes some effort to get it out of there. All of that tongue work will be a big turn on and once your partner does that, s/he'll know how to do it when there's no topping. ;-)
You can use chocolate, but of course, it looks a little too much like, um, well, other stuff to some people. Butterscotch or strawberry works just as well, though.