Note that whenever body language and various behaviors are discussed in mainstream behaviorism, the mantra is always context, context, context. And yet we can see in human behavior that jealousy is not dependent on context. It can become all consuming that follows one wherever they go and corrupts whatever they do. Furthermore it requires the thought that a rival is better than one’s self at capturing the attentions and affections of one’s Significant Other, and then woe is me when I lose my significant other down the road in the future to said rival. This potential for an emotional disconnect provokes an “epilepsy” of emotional spasms fueled by the thoughts of separation and future loss, one can’t escape these thoughts no matter what context one finds themselves in. The inescapability of jealousy is what makes it unbearable. Whereas when we see dogs supposedly acting jealously we see that they can shift in an instant from context to context and they’re not questioning their connection to their owner as a human would have to do if their Significant Other was the source of such anxiety. What we’re actually seeing in dogs is the primordial underpinning of the mental/cognitive experience in humans that underlies a mental state of jealousy, the loss of connection and the fear of falling, but the dog doesn’t carry it around and it doesn’t metastasize into a full blown state of jealousy. There is a distinction of kind, not by degree.