And its exactly a moment when one should stop for a second and ask him/herself a question "why would I feel so"?
Wearing glasses, reading books, dyeing hair with some tint, preferring pieces of clothing of some fashion or other, riding a personal vehicle that is supposedly beneficial for ecology (at least at the level of common knowledge) AND evidently improving quality of urban life - all of that shouldn't be embarrassing, or "completely" "socially inept"[1]. Wearing dirty clothes when you have the means not to or not looking after your hygiene should (and I can't really recall anything else at a moment's notice).
I agree it's weird but clearly as we see for cars, choice of vehicle is also driven by style preferences. E.g most people wouldn't buy a pink car with green polka dots.
They certainly can. Calling something with a particular epithet means it bears this particular quality, which is not subjective. The opinion is, but the characterization is not.
A lot of people do. Looking at something and saying "I don't think I would do that because it would be very embarrassing" is a thing adults can do.