I remember a two panel comic, in the first panel, an Anthropologist explains to his students that ancient people left their hand prints on cave walls with great symbolic meanings.
In the second panel, it showed a caveman leaning against a wall with one hand while urinating, then from another room a caveman yells, “Hey, who ate my chili powder?” Startled, the first caveman sprays red ocher chili powder all over his hand.
:’D