Watch Nick Jonas and 'Sesame Street' Make Pentagons Sound Sexy in "Check That Shape"

YouTube/Sesame Street

The "Chainsaw" singer collaborates with Bert, the Count and Cookie Monster on a hot new counting song.

If you were wondering why long-running PBS children's program Sesame Street is a perfect fit at HBO — also home to the not-at-all-safe-for-toddlers Game of Thrones — then Nick Jonas has your answer. It's called "Check That Shape," and in the video from Saturday's "Hooper's Lockdown" episode, the "Chainsaw" singer collaborates with Bert, the Count and Cookie Monster on a counting song that is ... weirdly sexy?

"Oooh check that shape," they sing in harmony over the slinky R&B groove. "It's a shape that is so fine," Jonas croons. "Yeah, the shape drives me out of my mind/How it moves and how the shape slides." Settle down, it's just a pentagon. 

But that octagon...

This article originally appeared on Billboard.com.

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