#4: Overgrown Jaw Bone
This has got to be one of the more benignly strange bodily phenomena that I’ve seen. It’s not like I spend a lot of time staring at the shape of people’s mouths underneath their tongues, but even so, something instinctively says to me this is not what it’s supposed to look like.
As far as I can tell, ladies and gentlemen, what we’re actually looking at here is an overgrowth of the jaw bone. So it’s not really a gap underneath the tongue, but rather a growth in part of the space where the gap is supposed to be. All of that space underneath the tongue is supposed to be a “gap.”