I was watching carefully. It's kind of funny I've noticed it's best to watch Survivor at the beginning when the contestants are still buff and bulked rather than at the end of the season when they are starved and malnourished.
Don't know the guy's name, but he was always in boxer briefs with his wiener bouncing around. Nice!!!
NakedStraightGuys.com has a blog post with photos and a video of Marcus's cock. During a race, it pops out of his underwear. I'm surprised it without being blurred out. Especially considering they took the time to blur out Michelle's coochie through her stained panties.