You might think something is so "icky" that you try avoid it, and scientists think there's a reason humans, and even some other animals, do this.
Head to https://scishowfinds.com/…
Meet the gibbons, orangutans, chimpanzees and gorillas. These are the apes: The largest and smartest of the primates. Oh, did I mention humans are included in that crazy ape bunch?
