Christopher Isherwood said this quote
“ Mr. Pilates was a bully and a narcissist and a dirty old man; he and Christopher got along very well. When Christopher was doing his workout, Pilates would bring one of his assistants over to watch, rather as the house surgeon brings an intern to study a patient with a rare deformity. ‘Look at him!’ Pilates would exclaim to the assistant, ‘That could have been a beautiful body, and look what he’s done to it! Like a birdcage that somebody trod on!’ Pilates had grown tubby with age, but he would never admit it; he still thought himself a magnificent figure of a man. ‘That’s not fat,’ he declared, punching himself in the stomach, ‘that’s good healthy meat!’ He frankly lusted after some of his girl students. He used to make them lie back on an inclined board and climb on top of them, on the pretext that he was showing them an exercise. What he really was doing was rubbing off against them through his clothes; as was obvious from the violent jerking of his buttocks. ”