I can honestly say I've never seen a chin like that in all my life.
I've seen many of those bumps, or protuberances, but more so in pictures of primitives than in real life.
The DemGirl primitive and Fat Che have one too, for example.
I suspect I don't notice them so much in real life, because in real life, usually I'm dealing with decent and civilized people, and if someone has one, I don't "see" it.
Recall what I said about cousin nadin; one's character and manners have a great deal to do with how we see someone. Vision is not an exclusive trait of eyesight. If a person's unpleasant, one tends to focus on the unpleasant physical characteristics. If a person's decent and civilized, one tends to focus on that person's aesthetic qualities.
I'm sure that there's some here on conservativecave who might be a little unaesthetic (franksolich is no great shakes himself) in some way, but if I were to meet them in real life, I wouldn't notice it. As far as I'm concerned, there's nobody but beautiful people here.
It was two, three, months ago, that one of our members admitted she has the same, uh, problem as the BainsBane primitive, which caught me by surprise.
I'd once seen a picture of her, and she struck me as a very attractive, effervescent, bubbly, friendly, warm, kind sort of person. I hadn't even noticed the too-large upper shelf.