This wasn't always the case, but “Sesame Street” has pretty much become a pop-culture-parodying machine. And there's nothing that “Sesame Street” is enjoying more than parodying very adult content for children and their at-home parents.
Following quickly on the heels of the “House of Cards” parody “House of Bricks” is “Game of Chairs,” which uses Grover Bluejoy as a point-of-entry into a lesson about rudimentary subtraction and musical chairs.
It's fun to see “Sesame Street” equivalents for Daenerys and Melisandre (“The monster is blue and full of errors”), plus the ultra-bratty Joeffrey, though the whole thing becomes a “Game of Thrones” continuity nightmare, if you stop to think about it.
Plus, HUGE spoiler on the end of the series, eh?
Mostly, I like this because it's Grover-centric, rather than pandering at the altar of St. Elmo.