Updated: Mar 4
Animals tend to have enlarged, elongated features and projections from their bodies coupled with entrances and crevices, including the eye, mouth, nose, ear and genital areas, with projection examples being tongues, noses, snouts, bills, trunks, outer ears, hair, eyelashes, colorful irises around pupils, tails, eyelashes, beards, whiskers, gobbles, waddles, tusks, swords in swordfish, paddles in paddlefish, elongated teeth that stick out of mouths as in walruses, hogs, saber tooth cats and narwhals, the large noses of the elephant, proboscis monkey, elephant seal, saiga antelope, tapir, mandrill, goblin shark or unicorn fish, the waddles of the three-waddled bellbird, spirals in Wilson’s bird of paradise, or the iridescent, splash-like gorgets of certain hummingbirds, which males expand around their heads during courtship. Such features apparently evolve through sexual selection, with the effect being most pronounced in the most ornamental animals. This probably reflects a universal feature of the animal brain and the choices that we make or it wouldn’t be so widespread. The length, roundness, hardness, color, direction and curvature of exuberant features around animal entrances are often adjustable, and may convey different emotions and intentions depending on their condition with respect to these variables. In humans the lips are an example. They naturally protrude somewhat from the face and are adjustable in how much they do so. They can be made more or less round versus long, and seem to mean different things accordingly. Humans have an apparent tendency to obsess over the the size and length of entrance-associated features in their own bodies, painting them bright colors, expanding them further or reducing them if they become too big or long, decorating them with various artificial objects, piercing them to make holes, and expanding the holes or fitting them with further decorations.