Oscar Isaac“The explanation” That viral red carpet PDA moment with Jessica Chastain is simple—and squeamish: They’re worms!

The following September saw the Scenes from a Wedding co-stars showcased their major chemistry at the event while promoting their HBO limited series. The co-stars held hands and wrapped their arms around each other while posing for the cameras, while Isaac also appeared to kiss and sniff Chastain’s inner upper arm. On SiriusXM’s The Jess Cagle Show this week, Isaac compared himself and the actress to…flatworms.

You can also cut the pieces into a dozen and each one will be a new worm. Moon Knight actor explained. They are basically immortal, and have been working at the cell level to see that cells talk through electricity to decide if they will make the head. They communicate through a magnetic field called “electro-magnetism”.

Isaac concluded, “That’s how Jessica and I kind of talk to each other. It’s like we are little flatworms.