Human nature?
For what’s worth other animals do things as a sign of affection ex bonobo ape.
The rest are from a Google search:
“Many animals actually do engage in kissing-like behaviours to show affection. These behaviours are so diverse, from dogs sniffing and licking potential mates, to elephants putting their trunks in each other’s mouths. However, one animal kisses just like we do: the bonobo ape”
Latest Answers