In 1945 Bob Mizer began taking photographs of strapping young men on Muscle Beach in Venice, California. In December of that year he formed the Athletic Model Guild to market his photos, and "physique photography" was born. Before Mizer there were bodybuilders and men who photographed them, but AMG photos, even those of the same men, were different, subtly provocative, discretely aimed at a gay audience. They weren't nude, but showed as much as...