Late-night host Conan O'Brien has found success with his "Clueless Gamer" segments over the last few years.

More than a few game companies have gotten Conan to take their new game for a spin in the weeks and months leading up to the game's official release. He's played Doom, Mortal Kombat X, Fallout 4, Witcher 3 and many, many more. After all, it's a great marketing opportunity for game companies, and the segments themselves are pretty funny to boot.

That being said, something tells us that Nintendo would have preferred it if Conan left Mario Kart 8 for the Wii U alone. Forever. Conan recently invited Neighbors 2 stars Zac Efron and Seth Rogen to play a few rounds of Nintendo's kart-racer, and things quickly got out of hand.

It's determined early on that whoever loses a race will be drawn on with a sharpie. Since Efron and Rogen are promoting a film about a college fraternity, that means every time somebody loses, they get a penis drawn on them. Because that's what frat boys do, apparently.

Conan claims the first victory of the segment, after which Rogen's arm can be found sporting a new genitalia-shaped image. From there things get much, much worse, as Conan loses round after round. Soon his entire face is sporting phallic images, as the trio attempt to make their drawings safe for television for referencing a hand diagram courtesy of Conan. They do a very poor job.

When Conan smiles into the camera at the end of the segment, face covered in vaguely penis-shaped images, you just might feel your childhood die. The whole segment is hardly in line with Nintendo's family-friendly image, but it's still undeniably funny.

It's also worth noting that all three players are using the game's motion controls, which is by far the worst way to ever play Mario Kart. Seriously, no gamer would actually ever do that. And the Wii racing wheels too? Come on, that's downright embarrassing. I guess there's a reason they call the segment "clueless gamer."

You can watch the full video of Conan losing terribly below.