"Why socks tend to “vanish.”
A study showed that, because of their material and shape (a flattened “tube”) they can hold a very large static electrical charge for their weight (most often acquired from tumble drying).
This charge makes them stick to all sorts of objects –and people’s clothing– where they can be transported to different places unnoticed. And because they are “boomerang”-shaped, with one heavy end, they soon work themselves free via pendulum motion. Then, again because of their flatness and weighted-at-one-end shape, they can easily slip into the cracks between objects when they drop.
Also: Cats and dogs love their weird combination of cleaned stink, and often steal these fallen socks."
Humans can’t be used as an example. Unlike any other species, we go very far out of our way to make sure the weak and feeble-minded survive.