Well, I'm not a doctor and I don't want to pretend playing one on this board. Just sharing a bit of my life experience and what I've gleaned from it.
As for mouthwash, it can very much so cause problems. Big problems. I learned that the hard way trying to medically treat myself. As I mentioned, (not something I've ever mentioned on a public forum), I have a tendency to get throat infections. It's like strep throat, but not strep. If you go in complaining of a throat infection, the first thing they will assume is step and they'll test you for it. After that, the likely candidate is rectal bacteria.
As much as I like the idea of eating a guy's ass, I very easily get a throat infection from it.
It can last up to 30 days. Be physically very draining. Bouts of nausea. Not fun.
Weak antibiotics aren't strong enough to handle rectal bacteria. Some Docs were savvy and 'knew' what my problem was and went to the stronger stuff. Others, following the general protocol of keeping as much of the good stuff away from the public since antibiotics are far too over used and becoming ineffective.
So silly me decided since I could not get the strong stuff, I'd treat myself with mouthwash.
And used enough of it to sterilize my throat, leaving it as an open oasis for oral thrush to set in. Something that does not much happen to healthy individuals. Bad news. -Worst week of my life. Self inflicted.
I learned my lesson. If you want to treat your throat, use salt water -or a bit of hydrogen peroxide in water- as a gargle. That's it. Leave the mouthwash to keeping your breathe sweet and minty.Just with the use of a proper gargle, you can cut down on the length and severity of a throat infection. Repeat. Repeat. Repeat.
Weakling that I am, I gave up rimming as my favorite hobby and switched to feet. Nice, lovely tasty men feet. LOVE IT. LOVE IT. LOVE IT. -Never had a problem other than the 2 incidents I mentioned. So by avoiding the specifics of those 2 events, I've not had a problem since.
-And Djdevilct is definitely onto something when he says it eating dirty feet can be 'jarring' to your system. In fact, I went a very long stretch of my twenties without any physical contact what so ever with other guys. And the first time I got an infection, it was SO strong. Mentioning this to the Doc at the gay clinic (God bless gay health providers!) the doc remarked that part of my problem was likely the fact that my immune system was such virgin territory. You don't want to go through life protecting yourself from common bug contact. It may seem contrary, but having your body fight off bacteria helps keep your immune system strong. The only contradiction of this is: so long as the bacteria is of the type that the immune system can win. And without help. Trust me OdorEater, if you go through life successfully isolating yourself from any germ contact, you are putting yourself in as much risk -or more- than you would be by eating feet.
For the most part, the contact you will have with feet are the sort that your immune system will beat like a cheap rented suit. So get out there and save your immune system.
Eat feet 7 days a week and call me in the morning.