When Charles Dickens wrote that “Man is the only animal that knows how to kiss,” he seems to have gotten the facts wrong. A simple Google Images search for “animals kissing” will turn up millions of hits. In fact, you can find plenty of examples in nature: moose and ground squirrels “brush noses”; turtles “tap heads”; many species of bats even use their tongues during courtship, writes Sheril Kirshenbaum in The Science of Kissing: What Our Lips Are Telling Us.