HP, at any party it'd be you and me off in the corner talking about this stuff, and everyone else wondering what the hell. I love it!
A study recently showed that dogs "laugh", exhaling rapidly and forcefully when excited. My dogs are short-nosed (Boston Terrier) and they SNORT when happy.
I'll go ahead and guess that it's a social thing. Like yawning; if you yawn, people around you will yawn. It's contagious. In fact, just reading this passage may make you yawn, and I'm about to yawn writing it. It's supposed to be a social thing that encourages us all to get tired at the same time and run the same schedule.
You can make the dogs yawn, too... it's a wild trick to get them to settle down.
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