So the story goes, it was 90 years ago that sales of men's vests began to plummet. The culprit: Frank Capra's It Happened One Night (1934) […]. This immaculate screwball comedy contains a memorable scene in which Clark Gable unbuttons his shirt, to reveal… nothing but skin. If a heartthrob such as Gable was happy to go about his day without an undershirt on, then, so the logic goes, the average American male would henceforth happily forego cosiness for sex appeal.
— Pamela Hutchinson (Sight and Sound)