A few possible explanations for what the hell is going on here:
-Jeff Winger is into some weird fetishes (hey, they’re not on network TV anymore — Dan Harmon’s free to indulge in all the scissor porn he wants).
-Yahoo! slashed Community‘s budget, so Joel McHale’s in charge of costumes now.
-Gillian Jacobs never got the memo that today’s Rub Your Blue Jeans Together Day.
I’d be OK with any of the three options.