i will caveat this by saying if it’s a private bathroom; totally permissible. if you can pull it off without anyone being in there with you, also permissible
It's true. I knew a guy that was and over brusher and was having problems with his gums. He thought it was an issue of him not brushing enough, so he brushed more, and harder, to make sure everything was spotless. When he went to a dentist, they told him he was brushing too much and should back off.
Sorry, but yes, you can also floss too much. Once a day is all you really need unless you're getting something out that is stuck between your teeth.
Disclaimer: I'm not a dentist.
So I see 😅 I wouldn't have thought this was so controversial. (Not to mention the ADA recommends brushing twice a day to avoid tooth abrasion, so three times a day isn't actually better oral health 🤪 but that's between the bathroom brushers and their dentists.)