An unbendable digit

Everything about this picture makes us slightly uncomfortable. Sorry, random Reddit user, but the texture of your skin has perfect groove marks that are a wee-bit unsettling. There’s also no wrinkling around where your thumb’s joint should be. What’s up with that?

Well, it turns out that that was the entire point of this picture. In his Reddit post, this user shared a weird fact about himself. Namely, his right thumb was missing its joint. He could bend it, but not all the way, as pictured on the right. How does he manage to hold onto beer bottles or baseball bats with his right hand?