I’m a full sink swisher. I’m personally not concerned. I appreciate your expertise and background, but I would imagine the act of blade buffing or going over a shaved spot on the skin more than once to be a much better transmitter of the bugs you speak of. Not the sink swishing.
One thing I do after every shave is towel wipe clean the sink. It has nothing to do with germs but it keeps the sink squeaky clean (from soap residue, toothpaste etc).
Very good advice. The towel cleaning the sink would help dry out and kill the bacteria, and whatever left over proteins won't be too worrisome. Blade buffing, I guess if that's what you call going over the same spot with a shaver, then certainly that will help irritate the skin. I use a 2$ bottle of all purpose body, hair, face oil that has some mix of 40 oils in it as a preshave. Got it at walmart, use like 3-4 drops as a preshave to lock in the moisture after showering.
Is swishing in the sink anymore unsanitary then brushing your teeth in the same room one performs myriads of bodily functions? Or using the same cup to rinse brushed teeth day after day? I swish. And I use disposable paper cups to rinse after brushing. We all have fears
I keep my toothbrushes outside of my bathroom and I use 2 typically. One soft and one hard brush. They dry on my cart in my room, and I alternate between the two every 2-3 days, and I soak them in the alcohol left over from soaking my double edge razor w/ blade before a shave. My sink is big enough for my to turn my head sideways and catch the water into my mouth without having to use a cup, or cupping my hands to rinse my mouth. I'll rinse my mouth after I brushed and flossed, brush the roof of my mouth after my teeth, and my tongue last. I'll make sure when I gargle the rinse that it gets the back of my throat and roof of my mouth by tilting my head up.
To repeat, I do turn the faucet on and off to rinse my blade between passes/strokes, though I do pull the stopper down when brushing my teeth just to see how much water I use. In south africa many people who have a tap supply generally don't have a consistent one, so they undo the U joint underneath and put a large round bucket underneath to use to flush their toilets., and many also stand in a bucket in their tub to shower in, and use that to flush their toilets as well. It's a very good solution but the only issue is if you ****, and there's splash back, it may be nerve wrecking.