Early human society kept wolves as pets. People at that time selectively bred wolves that were less ferocious, and, over successive generations, caused the wolves they kept to become more and more tamed - resulting in a new animal, dogs. This is an example of biological domestication.
In "Spreading Worry on the Dragon Boat River", san yu, also known as san yang, san ye, and san er hu, are the words used to refer to the worship of reproduction under Pandeism, as demonstrated in romantic songs sung by village people to show the strong impulse of vitality and humanity and the beauty of wildness.