From my perspective, the issue isnt them brushing their teeth, bit that they aren't cleaning up after themselves.

Do it every day. It is expected behavior in Japan. Before moving here I thought it was weird, though. Seems a reasonable idea both from an oral hygiene perspective and not wanting to have bad breath around co-workers and customers. Win, win.

I brush my teeth at work. every day after lunch. but I also know how to not leave a mess because I'm an adult. I've spent about $15,000 on my teeth in the last 10 years. So I try my best to take care of them. Just recently got dental insurance but it only covers a few things per year.

I have someone I work with that brushes her teeth at work. I admire her dedication.

I have far less issue with that than I do clipping nails at one’s desk!

I brush my teeth only once a day and last time I went to the dentist, she said that teeth were perfect and that I must brush them like 2 or 3 times a day.

I told her that I only brush them once a day and sometimes forget it entirely and she was surprised.

Disclaimer: NOT MEDICAL ADVICE, follow your dentist's recommendations and not my personal edgecase as an example.

It's weird, but whatever.

Much less egregious than leaving dishes in the kitchen sink.

As long as people clean up the toothpaste after they are done, I don't care.

I do this, but I rinse the sink. I've got anxiety and freak out about my teeth

Yes I brush. Coffee and lunch can get a little rough. Nobody would complain but why not do them and myself a favor.

I did when I had to wear a mask for 12h every workday. Since things relaxed I haven't gone back to it though.

I definitely have a "late wakeup" kit that includes a travel toothbrush and toothpaste. Since I commute by bus and occasionally lose track of time in the morning, I am prepared to brush in the office if I have to. On average, maybe once every two weeks. So far, no one has seen me do it, but I do make it a point to clean up when I'm done.

https://youtube.com/shorts/20dWpOSY3YQ