I enjoy seeing Maks shirtless and a bare chest was not out of character for the Samba. I wasn't crazy about the move with the pull-off sleeves or the ripping the shirt off, though. I'd probably liked it more if it was more straight forward - come out shirtless or just take it off all at once. Even so, it is hard for me to understand why that caused Len to mark off so much.
As far as Jake in tighty whities, even though it was in character for that dance (re: Risky Business,) I really didn't enjoy it. I've rewatched that dance and don't get where he received the encore or the score he did. if you look at the actual dance moves, there wasn't much there - and he danced worse in the encore dance than he did the first time. I think the hype of being pantless got him points, whereas Maks taking off his shirt, cost points for Erin.