Myrth

The oddest things come into your mind while traveling. While I was sat on the bus earlier in the week I started to think about humour. I have no idea why. But I wondered what the reactions were like to the first joke? What was the first joke?
I can understand how language developed. As we evolved we need to find ways to communicate (where is the food or what dangers are there out there?) But how did the first joke happen (and by that I mean the first gag rather than the first thing somebody did that brought on laughter). How did those who heard that first joke know to laugh? What were the cues?
I’ve no idea why it came to me but now it’s fascinating me.