Hugs, handshakes and air kisses serve the same crucial purposes as animal greetings like sniffing, eye poking and buttock grabbing
Source:
https://www.newscientist.com/article/mg24833080-900-evolution-explains-why-social-distancing-due-to-covid-19-is-so-hard/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home