Tech mogul Elon Musk and singer Grimes have something in common: they blend art history with artificial intelligence to make the nerdiest, most niche jokes.

The new couple arrived at the Met Gala together — Musk in a white priest-looking tux and Grimes dressed as a goth robot.

Elon Musk and Grimes bonded over the nerdiest joke. Image: Neilson Barnard/Getty Images

According to Page Six, nerdy, niche jokes are the reason the two are a couple. Apparently, Musk wanted to tweet a joke about AI, but Grimes had already made it.

Roko's Basilisk is a thought experiment that questions the risks of AI, hypothesizing a reality where potential robot overlords take over and punish humans who didn't help bring it into existence. Rococo is a style from the end of the French baroque period, characterized by ornate decorations, dense ornaments, and theatrical asymmetry.

Musk wanted to combine the two into "Rococo Basilisk," which Page Six muses might be a play on how ridiculous and complex both concepts are.

It's a joke that about two people in the entire world would probably get.

Those two people just happen to Musk and Grimes. Grimes made the pun three years ago, creating a character called Rococo Basilisk for her song "Flesh Without Blood."

She told Fuse that the character "is doomed to be eternally tortured by an artificial intelligence, but she's also kind of like Marie Antoinette."

An "insider" told Page Six that while Musk was researching the concept, he saw that Grimes had already made the pun and reached out to her. The anonymous source said it was the "first time in three years that anyone understood the joke."

Since then, they've been flirting on Twitter in the least subtle way.

Yeah, most people don’t know this, but comets r mostly made of cocaine — Elon Musk (@elonmusk) April 28, 2018

Just ask her out already Elon — cloudstrife (@cloudstrife447) April 28, 2018

😉 — Elon Musk (@elonmusk) April 28, 2018

Then on Monday, a few hours before Page Six published its story on Musk and Grime's relationship, Musk cryptically tweeted "Rococo Basilisk."

Rococo basilisk — Elon Musk (@elonmusk) May 7, 2018

Some Twitter users had some strong feelings about the new couple's relationship status.

finding out that elon musk and grimes are dating pic.twitter.com/c2YzZTM1LT — aidan mitchell 🌹✨ (@killaidanmitch) May 7, 2018

i didn't even know who elon musk was a couple of months ago and now grimes is DATING him? i can't handle this i'm taking a nap i have to fast forward time again — jake (@HUNTYCHAN) May 7, 2018

me: celebrity culture is toxic and impedes our ability to critically consume media

also me: has a podcast

also me: legitimately despondent that Grimes is dating Elon Musk — semifinals-garbage fieri (@buffalocialism) May 7, 2018

Omfg Elon Musk and Grimes have arrived pic.twitter.com/xs1qU9Vv6y — Maeve McDermott (@maeve_mcdermott) May 8, 2018

But with their Met Gala debut, at least Elon Musk and Grimes can be super nerdy together.