4. Animals Kiss Too!
Kissing seems to be a universally recognized affectionate behaviour, for animals do it too (though not exactly the way we do it). Primates as well as not-primates have demonstrated kiss-like behaviour. Chimpanzees often kiss each other after a fight, a gesture that seems to call for ‘kiss and make-up’ strategy. Elephants have often been observed entangling their trunks together; sometimes they strike each other’s mouth with their trunk. These are affectionate and consolatory movements similar to kissing.