One of our colleagues here was surrounded by americans when he was working in the US when he mentioned he brushed his teeth after every meal, all of them asking him questions. This is so absolutely normal here, since kidengarten kids go brush their teeth after meals, at some offices you can find some floss in the bathroom for the employees... I've been to the US but I've never worked there, but all the north americans we had here did not brush their teeth at all, and I found it to be a little bit weird, until I've realized that's not a common practice.

About shaving armpits, most, if not all, woman do it here, so yeah, that's not a nice view, such a beautiful woman with a hairy armpit...