I'm not going to debate this issue, so don't worry. I think all the opinions here have some degree of validity to them.
I did want to say a couple more things, though -- and then leave the topic alone:
It's interesting that someone actually DID mention something I touched upon regarding the delicate nature of the HIV virus when it is not in a host body. But the post in question is technically incorrect to state that "you will NOT get HIV." It is impossible to say this for certain. Yet this is also something I didn't want to get into -- it starts getting massively complex to painstakingly point out all the factors involved which contribute to how long HIV does or does not survive outside the body and when, exactly, its infectiousness is no longer a concern. So rather than bother with all of that, we can disprove this statement quickly and easily by saying that eating cum off the floor or from any surface where it has been deposited IS a risk for HIV transmission simply because we can NEVER know just how long it has been there. Video stores are active places. Men cum on the floors every couple minutes. Someone could shoot a load, leave a booth, and within ten seconds someone else could enter that booth and then subsequently eat that cum. Or it might be sitting there in liquid form for an hour. There is no way to know.
So please, let's not get into absolutes here when no absolutes exist.
Also, urine is STERILE when it comes from a healthy individual. There aren't any bacteria present in healthy urine which can cause illness. Drinking piss from the tap, assuming (and that's a very big word) that your partner is free of disease, is a very low-risk activity. Lapping up urine from a public toilet bowl, however, is not a good idea.
I'll agree with GuyTopeka in that this behavior is ultimately going to lead to a very unpleasant afternoon spent stranded within the confines of the nearest restroom, probably shitting and puking your brains (!?) out.
But I still think that mostly this disgusting habit is, unfortunately, fairly "safe" overall. The fact that semen makes a fabulous culture medium remains independent of WHAT is actually cultured ON IT.
The bacterial "menace" is all around us. Touch ANYTHING near you and you are touching bacteria. Most of it is nothing to fear -- we are well immune to everyday bacteria -- and much of it is actually beneficial to our survival as a species. However, there ARE lots of nasties out there which can make you sick, albeit it is unlikely that any bacterial illness is going to be long-lasting or cause permanent damage. You can effectively culture bacteria taken from ANY surface -- but it takes a while to start them growing at a seriously exponential rate. Semen dries in a very short time and loses most of its properties which make it a great culture medium quickly. We're not about to see mutant strains of bacteria being created in bookstores anytime soon. And a simple proliferation of bacteria which exist naturally in our environment is not going to be (most of the time) enough to make a difference as to whether or not you get sick or sicker or fall ill at all.
But YES, you CAN get sick from licking floors and walls, etc. You can also get sick from touching money and then touching your mouth. You can also get sick from touching the doors to restrooms and video booths and then touching your mouth (or face). We ALL do this sort of thing ALL the time and we don't even realize it (exceptions made for some of the OCD folks out there).
It's funny... about two weeks ago I was thinking about the TOKENS in video arcades. These little golden suckers have got to be EXTREMELY nasty in the germ department. Just think of the life they lead. They are in your pocket and in the pocket of THOUSANDS of other men. Just THINK of the interiors of the pockets of some of these dudes. I shudder to imagine WHAT might be in there! Then these guys are wandering around the video store, touching other men, touching other cocks, eating dick, eating ass, fucking, sucking... you name it. Tokens fall on the floor and some dudes pick them up. Many guys "finger-jingle" their tokens in their pockets as they walk around, letting other men know then are nearby, or just out of habit. The tokens get dumped into coin boxes and sit with hundreds of other tokens. They are cleaned out by... who? Which clerk? The clerk hands you tokens when you enter the store. What was he doing before he touched those? Did he just take a dump ten minutes ago, or maybe he had to clean the restroom? Who knows? Then the cycle starts all over again...
Tokens are filthy little fuckers, for sure.
I know I have touched tokens and then touched my dick or someone else's dick. Men have then sucked my dick. Men have licked my FINGERS. I have set tokens down on the seats. I've dropped some and picked them up from the floor.
Eh. I'm still alive. I haven't had a cold or flu in about ten years now, though I am quite sure I've had a few bouts of the trots possibly caused by some viral or bacterial unhappiness I encountered somewhere in my daily life -- well, that or maybe one too many Taco Bell "Big Beef Burrito Supremes."
A dude here once asked if he could get sick from just being INSIDE a video store. My response to him was something like: "No, don't be silly, AND yes, of course you can."
The same applies here, I'd say.
Medically, anything is POSSIBLE. But not everything is LIKELY.
I WANT very much to tell this dude that his habit is dangerous, foolish and just plain disgusting and that he should knock it off to protect his own health. But the reality is that I just don't feel that strongly about it. I think it's NASTY, sure. I think there is SOME small degree of risk involved... but I'm not certain it is any level of risk worth shouting about.
Touching the fucking tokens is bad enough -- there's no need to eat off the floor, too. But that being said... if we survive the filth that's on the tokens, odds are good we'd survive the filth on the floor.
But look at it this way -- eating cold, stale sperm off the floor is EXTREMELY LOW RISK for catching crabs!
Though you never know!