Okay, someone who's expert with ass please do enlighten me. Do you lick your partner's a...

Yes i do

Rimming can feel amazing. But sure, it's nicer if your partner is clean. It is an ass, but clean ass doesn't smell all that bad. Farting can happen. A friend of mine also found a little poop nugget, but ignored it and continued like a champ.
If you're really worried about poop the receiver of the ass licking can use an enema.

OMFG!!!!!!!!!!! this takes TMI to a whole new level!!! hahahahahahaha!!!!!!!!!!!!!! I love this place! (≧∀≦)

Wow, your friend is really brave

Wow.. I respect your friend... *Thumbs up*

I adore analingus, both giving and receiving. Though, it's best as a way to help your partner relax for penetration and/or prostate massage, some like to give analingus after they have cum in their partner. I don't like to do it once lube has been used. I hate the taste of lube, but ass alone - even a little dirty - is awesome. I certainly wouldn't rim a sweaty cowboy after he has been out riding for a week, but you're average "showered in the morning before work and rim in the evening" ass isn't bad.

There is "ass etiquette" for those who regularly perform anal anything (anal sex, anal play, analingus). A shower, an enema (usually quick and light if you play often and more thorough if you play less often) and a little self stretching masturbation with fingers is good to get you started. Some will also "pre-lube" during masturbation and stretching.

If you're new to anal, using butt plugs in increasing sizes (one size worn for a day, next size worn for a day) for about three days is a good way to get started. When you can fit three fingers (index, middle and ring) into the anus comfortably, you're good to go for the average penis girth. Bigger dick, more fingers. The most important thing to remember is USE PLENTY OF LUBE. There is no need to be stingy, it will only get you hurt. A good water based lube works best. My personal favorite is Gun Oil. No, not for firearms. It's a personal lubricant made specifically for anal. It's thicker and has a higher friction threshold. It won't break down as easily under "tight", hot conditions. Then, remember to relax all over and BREATHE when being entered. Don't hold your breath. It tightens the abdominals and sends "contract" signals to the rectal cavity and anus. "Doggy style" is the best for "first entry", with the chest down against the bed, but for prostate stimulation, "face to face" (sitting or lying down) or "spooning" have the right "angle of approach".

Also, those who are faint of heart over things like feces and flatulence learn pretty quickly to "get over it" or don't do anal. Condoms serve a triple purpose here. Health protection, lubrication and cleanliness. No dirty dicks if you wear a condom. Farting happens, especially after a vigorous round of pounding. It's no different than air being expelled from a vagina during sex though. Since it didn't originate in the gut and is caused by air being forced in through the anus, there is no smell. First timers having their ass rimmed may fart from nerves, but if you love them enough to stick your face in their ass, what difference will a fart make, really?

As for taste... "It's a bit nutty." LOL The average person doesn't leave swathes of shit on their bottom for the day, so most asses are clean and only have the taste and scent of sweat, even without a shower. However, it is only polite to clean up before you let someone go down on you, regardless of whether it is a vagina, penis or anus. See "Ass Etiquette" in my previous post.

Whow, very informative, thanks. Yaoi gives a global view of the thing but real experiences give better details.
Now I have some questions :
How do people who suffer from regular constipation usually do when they do anal?
If someone is suffering from intestinal parasites, can those be transmitted through anal sex?

I sometimes wonder it... It's only for knowledge purpose :)

Bith are excellent questions! First, someone who suffers from chronic constipation will likely not have the same appreciation for anal sex that a person with healthy bowels would. There is a lot of "unnatural" actions happening in the rectal cavity and pressure on the intestines during anal sex that can cause discomfort and pain. Analingus, not so much. Those who suffer from chronic constipation may find the enemas used for cleanliness helpful though. As for parasites, yes they absolutely can be transmitted during analingus, but not necessarily during anal sex. Though, not in the way that you might imagine. If a person were to eat roundworms, hookworms or tapeworms like pasta - sorry for the gross visual there - they would not "keep" those worms inside them. The worms you ingest would die and be dissolved in your stomach, but the eggs they carry would survive and then hatch and grow in your intestines. The eggs are microscopic and very tough. They can even be transmitted through the nasal passages and tear ducts once the egg is exposed to the air after its parent has been expelled and died. Human transmission of parasites is now extremely rare in most developed areas of the world, but there are others, like coccidia - a single cell organism found in water tainted by animal feces - and e. coli - a bacteria common and necessary for digestion - that, in large quantaites, can kill and are found even in the most developed and sanitary of countries. So, analingus with anyone who is feeling "under the weather" is unsafe for both partners. For the "sick" person, the stress of sex lowers their body's ability to fight off what is making them sick. For the "healthy" person, they risk picking up whatever is making their partner ill, which applies to everything from a bacteria to a parasite to a virus. Even in cases of chronic diseases and disorders, excessive stress on the body, whether from sex or daily living, prevents the patient from healing or being able to fight off other "invaders".