I wear a mask in any shop I go into, because in the shops I go into the staff are wearing them, plus in other places I don't know who is going to cough in my ear, which has happened.
As far as I know, I haven't had C19, and I intend to keep it that way until the coast is clear.
But most of all, I have absolutely no problem wearing a mask if I think I need to, bit like wearing a seat belt in a car, no problemo..... ????