Whether you find belly buttons fascinating or totally gross, you’ve probably been asked at least once if your life if you’ve got an innie or an outie. For one man, named Mark from California, the answer to that question is definitely an outie.

Mark has the biggest outie belly button in the world and it’s totally freaking some people out. The 26-year-old openly admits that his belly button is actually one inch long! He says it doesn’t bother him, though, since it tucks away nicely into his torso to make a little “swirly” shape.

“So like, literally, my umbilical cord is still partially attached. Fortunately, the one inch of umbilical cord does tuck away nicely into my torso if I push it in. It creates a cinnamon roll shape, I call it my ‘swirly’,” Mark explains.

This huge belly button is the strangest thing you’ll see all day:

Told you it was weird…

This is why Mark is better known as “Swirly Dude”, at least on the internet anyway. He has uploaded videos of his abnormality, and as much as it makes me uncomfortable to watch, others are absolutely loving it.

One online fan offered Mark $1,000 for an hour of footage of belly button fiddling, while another fantasized about being “shrunken down and tucked into [his] belly button to live forever”.

So, are you ready to see it…?