#8. Twins as a mortal threat
The Aztecs had odd and often contradictory beliefs about twins. Their myths were full of twins, usually treated as venerated deities worthy of the worship of man. Twins appeared in their stories as monster slayers, heroes, and even the creators of the world. Real twins, though, were treated with complete contempt. They had one god, Xolotl, for both deformed children and twins because the Aztecs considered twins to be a deformed child. They saw twins as a mortal threat to their parents. Allowing twin babies to live would mean the end of your life. So most parents chose one of their baby twins and sent it back to the gods.