Ever look at old-time photos showing their era's paragons of manliness? Ever notice how many of those turn-of-the-century sex symbols are proudly repping dad bods? It actually gets stranger: other models from the period look every bit as sculpted and Grecian as Brad Pitt in Troy, but no one seems to care. There's no indication that anyone in 1900--the photographers, the models, or the audiences--preferred the buff guys to the dad bods. What changed?