Found it. Here’s what he said…

“One, if you want to be champion, you have to be willing to sacrifice everything. Anything that interferes with your goals, and that includes sex, has to go. Or, number two, you can have your testicles out. Have your nuts removed. You’ll have to learn that there are going to be women around, women who, before a fight, will say, “Oh, wow, look at your big muscles.” I tell them the same thing: Just say no.“