Buster Crabbe (1908-1983) won the 1932 Olympic gold medal in the 400-meter freestyle swimming event. After that, his spectacular good looks got him into the movies. He is best remembered for the popular movie serials in which he appeared from 1933 into the 1950s, playing the top three syndicated comic strip heroes of the 1930s: Tarzan, Flash Gordon and Buck Rogers.
Below, in 1934's (pre-Code) Search for Beauty, he is enthusiastic for a shower: