My mother would when I was slouching in a chair. Until recently, my posture was perfect. (Thank you Navy.) When my spine started to deteriorate, it became more difficult to stand straight. I have to force myself.
Yes when I was in the army fifty years ago roughly.....I was told by my Sargent on parade to stand up straight and stick my chest out.....I never had any more problems from him after I comp'lied :)D