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How do my gums know if I'm having sex?
If you engage in any oral fluid exchange (kissing, licking, oral sex) then there will be small microscopic souvenirs floating around in your mouth for some time. Your body, and your skin, have natural defenses, so this isn't a huge deal usually.
If you have cuts in your skin, or direct pathways from the outside to the inside, then any of your souvenirs could get directly introduced into your bloodstream, reducing your natural immunity defenses. Unnecessarily.
Brushing your teeth, and flossing your teeth, can cause abrasions and bleeding, even microscopic un-noticeable bleeding, which is enough for a pathogen to transverse the blood barrier.
So to be safe, don't brush your teeth, don't floss your teeth, immediately before or after sex
Or during.
Can we stop with the kink shaming?
Tongue scraper is fantastic. Got a cheap metal one online for less than $5, works great and is easy to clean.
I've generally read that you should avoid brushing for about 30-60 minutes after eating anything, since the acidity of your mouth is elevated and that softens your teeth more than normal.
cmv if you have different data I guess