Okay, this question is kind of gross (and of a sexual nature), so please know that I am not trolling!
The weak of stomach, be fore-warned, this (serious) question is about anal sex.
Okay, my (very adventerous) husband and I have tried this several times, and though I enjoy it, it does cause certain problems for me. That is, afterwards I tend to have bad gas and diarhea (sp?). Can anybody tell me why this happens, and what I can do to prevent it? It really spoils an otherwise pleasureable event.
Also, I would appreciate it if the jokes and flames could be kept to a minimum; I am already quite embarassed in posting this topic. Please be kind!
Gas? Because you have a tight fitting object shoving air up inside you. Diarrhea (sp) (just a guess) there is a foreign object in your butt. There’s probably some defense mechanism. I believe you should probably be empty for the most part.
I think many of us are familiar with the primitive air compressor we create when driving a queen-sized bed across the room dog-style. The same principle applies to other orifices.
My guess is the lining of the rectum might be irritated and so increase peristalsis in the intestines, decreasing the time for water absorbtion. Hence the diarrhea.
I agree with Matt. Use an enema beforehand. The reason the gas happens has already been stating. A penis will force air into your butt. I assume this also happens vaginally but I don’t know. Diarrhea happens for a couple of reasons. 1) You are not used to having an object up your butt and thus irritate the linings a little bit. 2) Lube and cum make it easier to shoot poop. 3) Lube and cum with a ramming device make hard poop into diarrhea (think mortal and pestel…like making guacamole and adding water).
I hope this helps.
HUGS!
Sqrl
Gasoline: As an accompaniement to cereal it made a refreshing change. Glen Baxter
Now there’s something I never thought to compare guacamole to :). BTW Sqrl, its mortar and pestle (just so you know). Anyway, I agree, with anal sex it tends to drive the lube up further, and if you arent cleaned out enough you will have an urge to go after sex (and often the stuff that comes out is liquid).
Whoops, my mistake. I knew it was mortar and pestle. I blame it on the evil typing faeries, and they know who they are.
Queef? It can’t be any worse than the menstrual cups. That was pretty foul. Tell me, tell me, tell me. Perhaps it will be something bad enough to gross out some of my friends, assuming it grosses me out too.
HUGS!
Sqrl
Gasoline: As an accompaniement to cereal it made a refreshing change. Glen Baxter
Bar none, the funniest/most horrifying thing to happen to a woman in bed (depending on your partner). Personally, since I’m happily married, when it happens I laugh my head off. If it were a first date or something, I would want to die. Or laugh myself sick…all depends.
A friend is someone who likes you even though you’re as ugly as a hat full of assholes. Zettecity
I wasn’t grossed out - got a good laugh (which I needed). Ya wanna get gross? How about when the guy pulls out and has a something little extra on the end of his dick? NOW THAT’S EMBARASSING!
My wife queefs frequently after sex. What’s so gross about that? It doesn’t smell bad and nothing repulsive is expelled, at least nothing that I didn’t recently deposit into her.
As for anal sex, I tried it a couple of times in the past and after experiencing it I can now say that I just don’t get it. Reasons: 1) there’s another place very close by that was actually intended for you to stick your thing into 2) the woman doesn’t seem to have too much fun and 3) you get shit all over your dick.
Tell me, tell me, tell me. 
Perhaps it will be something bad enough to gross out some of my friends, assuming it grosses me out too.