Spoilers: (Highlight to reveal)
So gay sex... penises going into the ass. But doesn't poop come out of the anus? Yes it does! Sometimes poop can be waiting in the piece of intestine that is close to the anus. So if a penis goes into the ass, it can reach the turd and when the top pulls the penis out, there's crap on the penis. Nasty, huh? Hopefully the top wore a condom even if both parties are in a monogamous relationship and have been tested for a myriad of STDs.

So what to do? How do you avoid the nasty scenario I will illustrate in detail later on? Well, you make sure the bottom douches! And what is douching, you might ask? Well in the case of gay men, it's when a man uses what is essentially a turkey baster to rid his bowels of undersireables.

First, the long, thin spigot-like part is inserted into the anus. If you buy disposable douches or enemas, that long, thin spigot thingie sometimes comes lubed for easy insertion. Then the bulb or bottle or whatever at the bottom is squeezed so that liquid goes into the anus. The liquid is usually water, but there's others that may be more beneficial... somehow. Anyway, now that the lower intestine is partially filled with quite a bit of liquid, the person feels like they have to poop real bad!

So they take a dump, but it's mostly water. However, bits and pieces of poop will also make their way out (if there was any poop to begin with, that is). So you flush the toilet and then do it again, because maybe it's still dirty up there. Most gay men do this until the water comes out pretty clear. If it's murky, you might want to do it some more. But don't overdo it! Apparently, there is this thing called "intestinal flora" or something, and it's this... thingie that lines your intestine and it's good to have it there and if you douche too much you might get rid of it and maybe getting a penis up there will hurt more... or something. The point is, don't overdo it.

Now your bowels are clean and ready for anal sex! Douching is very very important for gay sex. When someone fails to douche, something like this can happen:

Ok, so you've spontaneously decided you're going to have sex with someone. Let's say you don't know the guy but are interested in him. You assume he douched before going out but he doesn't say the usual "I dunno, I'm not sure if I'm clean up there". Worse, you don't ask because you think it might be awkward. So you put on a condom (safety first! also, cleanliness is next to godliness) and insert your penis into the anus. You thrust it a bit and once you shove it all the way in, you notice... something. It's like you hit something or ran into an obstacle... like a road block.

You freak out in your head because you KNOW what you ran into, but at least you put on a condom, right? RIGHT!?!?!?!? Of course! So you keep fucking the ass and try your best to pretend like nothing happened. Remember, there's pressure on you (the top) to perform! You must satisfy the bottom or else you might feel inadequate and less "butch". In fact, if you're a bottom and the guy topping you came before you, say the following to make him feel REALLY emasculated: "That's it? I didn't even get to cum! I hope you plan on helping me finish...". It can be quite traumatic.

Anyway, you're having sex, you're ignoring the poop you ran into, the bottom cums and you decide to cum inside him. And now....... you pull your penis out. And.... ugh..... you see it....... you see a chunk of poo on the tip of your condom!!! AAAAAHHHHHH! It's HORRIBLE!!! The smell! It's so bad! The bottom will usually say something like "Oh, I'm sorry... I'm so embarassed" and then you say something like "Don't worry, it's ok... no big deal... none got on me". So you take a bunch of paper towels and you caaaarefully take the poopy condom off and throw it in the trashcan you will decontaminate shortly after the bottom leaves. Actually, you'll probably kick the bottom out after you tell him he can shower if he likes.

When he does leave, you take out the trash and then get out the Bleach and/or Tilex. You wash the trashcan thoroughly and then go take a shower. Once in the shower, you spray a bunch of Tilex on your hands and genitals because you're still so extremely disgusted. You finish cleaning yourself and then you proceed to change the bottom's number into the "Don't pick up" contact on your cellphone. You won't sleep very well that night and might feel dirty and ashamed for a couple more days.