[zelly]

It's not science. Human brains are very recent in evolutionary terms. What a frog or a peacock does is a result of many orders of magnitude more time under natural selection than the age of modern humans. People guess that this or that behavior is because of natural/sexual selection and pass it off as science with no proof just because the word evolution was mentioned. It takes a very long time for something to become an instinct. Given how much human brains are capable of, I just think the most Occam's razor answer is culture and mimicry rather than somehow some {{uniquely human behavior}} having been important enough to survival to become an instinct across the board.