Where I live almost nobody is wearing briefs anymore. Guys who used to when I started swimming with them 12 years ago have gone to jammers. And a swim coach told me recently that jammers have brought more boys into the swimming ranks. I guess they were too self conscious for briefs. He indicated that the movement to jammers was to keep the sport alive, esp. for boys. I call them briefs because Speedo is a brand name. My briefs often are TYR.