Alphabeasts! is Futakuchi-onna, the two-mouthed woman. A woman who has been starved, often by a miserly husband, develops a second mouth in the back of her head, two snaky ropes of hair that reach out to grab whatever food is nearby, & a hugely voracious appetite, though no food passes through her normal lips.
Acrylic on ad scanned from a 1937 True Experiences magazine, ~5"x6"
Isn't it interesting how much ideals of beauty have changed since then? And how little advertising has? This magazine was full of weight-gain snake oil ads... exactly the same tone of shaming & quick-fix hope as in today's diet ads, only in the opposite direction!