Are you practicing a skill while female? Studies show this is often misread by older men as a loud plea for unsolicited opinions. Next time, you can tell him to read your chest carefully. You can even add helpfully, "It's really bad - my throat will close up if I hear the word 'should.'"
"To be sure, intellectuals, contrary to the fantasies of cultural vigilantes, are hardly ever subversive of a society as a whole. But intellect is always on the move against something: some oppression, fraud, illusion, dogma, or interest is constantly falling under the scrutiny of the intellectual class and becoming the object of exposure, indignation, or ridicule.” -- Richard Hofstadter, Anti-Intellectualism in American Life, 1963