Ass-to-Mouth Oral Sex (ATM)
Ass-to-mouth oral sex, better known by its colloquial acronym, ATM, is anal sex followed by oral sex on the penis right after it is withdrawn from the anus, usually without cleaning it off. The allure of this particular sex act comes from porn, though oftentimes the reality of it often fails to live up to the fantasy. As with many other fantasies, some people will eventually get to the point where they want to try it. Knowing what is involved and the risks associated with it allow you to make an informed decision about whether to give it a try.
Why would anyone want to do that?
As with other "extreme" sexual acts, this fascination originated from pornography. Within the past few years, the ATM has become a ubiquitous feature in just about every porn movie. The guy fucks the girl anally for a few minutes, withdraws it and she proceeds to go down on it just as she would any other time. And, like many other acts seen in porn, it gets into the mind of those who watch it and it becomes part of a fantasy they develop. The ATM act is seen as nasty, slutty, taboo, etc., and for many, the dirtier the sex act, the more it heightens sexual arousal through that fantasy.
What does the person sucking the cock get out of it?
Generally speaking, nothing s/he wouldn't get out of sucking a cock that hadn't been in someone's ass. If you get a lot of pleasure out of going down on a cock that hasn't been in someone's butt, then you'll probably get the same pleasure going down on one that has, more or less. If you can get over the "eww" factor of where it has been, then doing ATM is no different than giving head any other time. Some people get a great deal of pleasure out of performing an act that they know their partner will get off on, even if they dislike it, and that is part of the draw of the act for someone who's performing ATM.
What will it taste like?
As with any other sex act involving taste, there are several variables that will determine what a cock that's been in an ass tastes like. If the anus/rectum had been cleaned before-hand (with an enema), you're liable to only be able to taste just the lube. Generally speaking, KY and AstroGlide have very slight, sweet taste to them, and if you use flavored lube, then so much the better. If the rectum hadn't been cleaned, then people report a variety of different tastes – some sweet, some salty, and some bitter. Even with penetrative anal sex in general, some people have naturally "clean" back ends, while others don't. There's no way to know for sure until you actually try it.
What are the health ramifications of doing ATM?
Many people like to believe that you can catch all kinds of diseases and infections from taking something out of your ass and putting it in your mouth. The truth is, if you have a disease, you can't "re-infect" yourself. If you have hepatitis, for example, doing ATM isn't going to give you hepatitis again. If you don't have hepatitis, doing ATM is not going to magically create the hepatitis virus and cause you to have it. The same is true for all of the other illnesses and conditions that you might hear or see people refer to when discussions of ATM come up.
The one thing that might cause you some problem is the e. coli bacterium. Though everyone has this in their bodies, it occurs naturally only in the lower intestinal tract. Putting it into the upper intestinal tract presents the opportunity to make you sick at your stomach, but the chances of that seem to be relatively rare. The mouth and digestive system is designed to be fairly robust and small amounts of any bacteria that enter it are quickly disposed of. There are only anecdotal mentions of people getting sick to their stomachs from doing ATM (though, as you might imagine, there have been no legitimate research studies on this particular practice). The bottom line is that, though it is often exaggerated, there is a slight risk of getting sick as a result of doing ATM. The best way to mitigate this is to ensure that you follow appropriate sanitary practices (see below).
Note that this is different if you're involved in a group sex situation and you perform oral on a cock that has been in someone else's ass. These acts are not uncommon in porn as well, and if you involve yourself in a group sex situation and this subject comes up, you need to be aware that performing oral on a cock that has been in someone else's butt is not any different in terms of disease transmission than performing oral on one that has been in another pussy, just with a slightly different set of potential diseases.
How do I get my partner to try ATM?
The most effective and least problematic way is to just ask. Obviously, if your partner hasn't been introduced to this then s/he's liable to be shocked when you first bring it up. The best way to introduce someone to it is by letting them see some porn that has ATM in it. You can gauge their reaction and get some idea of the possibilities. Since it has become more commonplace, you should have little problem finding source material to demonstrate what is involved and the fact that quite a few actresses do it.
It is possible that you might find your partner willing to do a lot more than usual in the "heat of the moment" and if you've unsuccessfully tried to get him/her to give it a shot before, s/he might be a little more open to it when the horniness is at full bore. Horniness has a way of reducing inhibitions on several levels. This should only be done after you've given the subject some discussion, however. Just springing it on a partner, though it might be fruitful at the moment, is liable to introduce disgust to your partner when s/he thinks about it after the horniness has rubbed off (or been siphoned off by the orgasm). If a partner knows that it is a fantasy of yours, then s/he is more likely to try it at some point (perhaps even as a surprise) when the juices are flowing than if you just ask randomly in the middle of a sex session.
The same basic process should be followed if you're the one wanting to do ATM. A male partner is liable to be freaked out if you just tell him to pull his cock out of your ass and you try to go down on it unannounced (despite the stereotype, not all guys get off on every act they see in porn). If you've seen your partner have a positive reaction to this in porn, or he's communicated the desire for you to do it, then you might do it to surprise him in a future sex session. Chances are you'd see an immediate, positive result.
What if you just can't bring yourself to actually do it? Anal sex expert Tristan Taormino offers one suggestion for a way to simulate ATM. Pull out of your partner's ass as s/he closes her eyes. Have an anti-bacterial baby wipe nearby (use unscented ones). As you pull out, quickly wipe off your cock with the baby wipe and put your cock in his/her mouth. Another alternative is to use a condom for anal penetration, and as you withdraw, pull it off and put your cock into your partner's mouth. Of course, the fellator can have a wash rag handy and simply wipe it off in a hurry as it comes out of the ass. Regardless, once you're done (either using the alternatives or actually doing ATM), you'll want her/him to rinse his/her mouth with an antiseptic mouthwash.
In the end, it is important that you understand that your partner might find this particular act disgusting and may not want to have anything to do with it. You *must* respect his/her wishes to not engage in this sort of activity. Anal play, especially that involving contact between the oral cavity and the anal areas is repulsive to many people. Trying to coerce a partner into doing something such as this is not something a person who values their partner tries to do – respect your partner's boundaries just as you'd expect them to respect yours!
How to prepare for ATM.
The single most effective thing you can do (and this is true even for basic anal sex) is to use an enema to cleanse your lower colon and rectum out. You can find out more about how to do this HERE. By cleaning your lower intestinal tract out, you decrease the risk of getting any “foreign substances” on the cock and/or copious amounts of bacteria.
If you want an idea of what it is going to taste like, you can lube up a finger or a dildo, insert it in your ass and fuck yourself with it, withdraw it and insert it into your mouth just as you would a real, live cock. You can do this in the privacy of your own bedroom and no one will know. It will give you an idea of what you're liable to experience with the real thing, though, and perhaps can be used as the basis for your decision as to whether or not to try it with your partner.
Summary
Ass-to-mouth oral sex is fairly commonplace in today's porn, but the reality is that relatively few people actually get off on doing it in real life. It makes great fantasy fodder for some people, but for most people the thought of putting an ass-covered cock into their mouths has a huge gag factor to it. Having said that, there's nothing wrong with trying it if it is something that interests both of you – anything done between two consenting individuals is acceptable in the sexual realm, so long as you understand the risks involved.
If you're interested in trying it, discussion and negotiation with your partner is essential, and you must respect your partner's boundaries, whatever they may be. If you do decide to give it a shot, make sure you take the appropriate sanitary precautions prior to and after doing it. Though there are some risks associated with ATM, they are not any different than any other form of unprotected sex. Just be safe, make sure everything is consensual, and respect your partner's boundaries! If it turns out to be something you enjoy doing, then you have one more practice to add to your sexual repertoire. If not, then you don't have to do it anymore.
