This clip comes from a classic Hollywood sound library, where it was catalogued as a funny wet smacky kiss. It was heard as far back as the Pluto short Canine Casanova, released in July 1945, where such exaggerated foley noises punctuated every gag. As old cartoon libraries were digitized and shared online, the kiss became a stock effect for animators, editors and meme makers, popping up in amateur cartoons, comedy sketches and reaction videos. Its charm is its age: more than eighty years on, the squeak still sells a joke faster than any line of dialogue.