i am with you OP. Excepting those who use wipes or gel later, for skincare reasons, I am quite surprised at the number of people who seem to have missed, or misunderstood, everything anyone ever tried to teach them about sanitation. Someone even says she takes care to wash when people are sick at home, but not the rest of the time. FFS, how do you think you get sickness that gives you V and/or D symptoms? No, it wasnt food contamination by the restaurant, it was your own dirty hands used to hold your sandwich, or adjust the lid of your coffee cup or stick a straw into your kids juice box.
Wash your hands after the loo, because even if you dont get pee or poo on you, your crotch area and the bathroom itself, even the one in your house, are covered with germs. Wash your hands before handling food, because who knows what was on the door handle of the resteraunt, the handrail at the train station etc. not being visibly dirty isnt the same as being clean enough to go anywhere your mouth or your food.
I agree if you start really thinking about it, you can turn into a crazy person, but after after the loo and before eating Is BASIC and minimal. It's what you teach children. its what you expect of food and healthcare workers. It isnt a matter of a trying to reach an impossibly germ free state, its a numbers game. Bacteria multiply exponentially and you have no idea what you might have been exposed to. A wash every few hours and at points where contamination is likely reduces your chances. A small exposure can become a big enough exposure pretty quickly if you make it easy. You might have to skip it or do a bad job if facilities are lacking, but even a bad job disrupts the cycle. Except maybe the 3 Second Swish Method.
Micah, as a general rule, oral sex is a no unless he has showered. He walks and runs everywhere, and unless he has recently showered, the accumulated sweat is of no interest to me. There have been exceptions. Again, its a numbers game. Even the most OCD person will be exposed eventually, but that's not a justification for not trying to limit exposure.