Wrestling in singlets does remind me of a soft-porn video I once saw, that I found strangely hot, and have always wished I could find something similar in DVD.
I went into the Cuff in Seattle, 1997 I think, right after leaving the old Slaughter's (later C.C. Attle's), where Larry always made my noontime gin martini to perfection. The Cuff opened at 2 PM, and I'd be there shortly after, parking my motorcycle on the sidewalk out front for my second round of drinking.
The video they had playing was silent, but the scenario appeared to be a college wrestling team practicing by pairs, wearing singlets. One guy had his singlet ripped to shreds by his opponent (of course a serious foul in real competition), and as the other wrestlers mocked him from the sidelines, he ripped the remaining shreds off, standing there butt naked.
He seemed to angrily challenge his opponent (again, no sound or subtitles), who obliged him by stripping off his own singlet. Totally naked, they both resumed their practice match, which really turned me on, as they actually performed some legitimate moves and holds. I don't recall a "coach" being in the scene.
They finished their matchup, and after some brief debate among the other team members, they all stripped naked, and took turns on the mat in pairs. No sex, this was soft-core, but I found it highly erotic. Ever since that day I can't see young wrestlers in singlets without flashbacks to that video in the Cuff, singlet bulges or not.