#3: It Happened One Night (1934)
The image is famous: Gable undressing in It Happened One Night and revealing no undershirt beneath his dress shirt. Legend says undershirt sales plunged afterward, though the claim is more Hollywood folklore than proven retail history. Either way, the scene mattered. Gable made casual masculinity look effortless. He won the Oscar, charmed Claudette Colbert, and somehow turned bare chest plus smirk into cultural weather.
