Photographer Robert Trachtenberg, who grew up in Hollywood, remembers standing in line to buy milk next to Cary Grant. With movies in his blood, he attended the American Film Institute with a plan to write, but got a job with a well-known celebrity photographer and soon decided to try photography himself. Needless to say, it worked out. His work has been collected in numerous books, the latest of which, Red-Blooded American Male, came out this fall. We talked to him about how he coaxes his famous male subjects into compromising—and yet somehow dignified—positions, and how editorial photography is changing.