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Robert Francis O’Rourke, aka Beto O’Rourke, is a candidate in the 2020 Democrat presidential primaries and there’s a meme making the rounds split screening him with Butthead from Beavis and Butthead meme.
Beto may share some personality qualities with Butthead that make this comparison resonate on a non-physical level but the reason the comparison resonates on a physical level is mainly due to the structure of Beto O’Rourke’s mouth.
Let’s get the dissimilarities out of the way first. The hair is different, Beto has bigger eyes, Butthead has beady eyes, Butthead has a drooping nose. Beto has an upturned nose. Butthead tiny ears, Beto larger ears, and so on.
Back to Beto O’Rourke’s mouth meme.
He does exhibit a Butthead-like gummy smile in some photos but Beto has muscle weaknesses in the lower half of his face and the development of other muscles which compensate for those weaknesses. Those qualities are what give Beto a weak Butthead-like chin and mouth. To be clear, his mentalis and other underdeveloped chin muscles are compensated by a thickening of his orbicularus oris muscle, that muscle that circles your lips, but a pronounced thickening only directly under the lower lip, creating a Billy Bob Thorton Sling Blade lower lip protrusion, as well as a thickening of his Risorius and Buccinator muscles, which create the noticeable pouches on the sides of his mouth. Beto’s tongue positioning during adolescence may have also contributed to his facial imbalances as well as the actual bone structure of his face, specifically a weakened mandible with a long receding chin and the opposite of a square jaw.
This structural anomaly in an isolated area of Beto’s face creates enough of a similarity to Butthead that it over rides the overwhelming majority of the rest of his features which analyzed separately bear no resemblance to the Butthead character but in the aggregate give Beto a Butthead-like countenance.