In Japan, where people didn’t speak English very well, he said it bothered him, ‘cause he couldn’t even cuss there.
Miles’s attitude was that if those motherfuckers over in Japan didn’t understand the hip transgression of blasphemy, he had to admit that there wasn’t much point in it.
"… Anyway, I really kicked my habit because of the example of Sugar Ray Robinson (picture above); I figured if he could be as disciplined as he was, then I could do it, too. I always loved boxing, but I really loved and respected Sugar Ray, because he was a great fighter with a lot of class and cleaner than a motherfucker.
He was handsome and a ladies’ man; he had a lot going for him. In fact, Sugar Ray was one of the few idols that I have ever had. Sugar Ray looked like a socialite when you would see him in the papers getting out of limousines with fine women on his arms, sharp as a tack.
But when he was training for a fight, he didn’t have no women around that anybody knew of, and when he got into the ring with someone to fight, he never smiled like he did in those pictures everybody saw of him. When he was in the ring, he was serious, all business.
I decided that that was the way I was going to be, serious about taking care of my business and disciplined…”
Miles Davis about kicking his heroin addiction and why he never was a crowd-pleaser on stage (smiling, announcing songs, acknowledge applause etc.)
In Quincy Troupe’s ’Miles The Autobiography’ (page 174)
Miles in his boxing gear