Three of us, all blokes, were tootling down the M1 in heavy traffic. For some reason we began a brief conversation about jokes. Did we know any? Well we didn't because we aren't the kind of people who remember jokes so that conversation didn't last long.
I started me off on a train of thought though - how many people do remember jokes and why do some of us forget them so easily? I must have heard thousands of jokes but in the car couldn't recall a single one. None of us could.
Maybe jokes lack hooks which attach them to our longer term memories. Maybe they aren't socially useful, or at least many of us don't find them socially useful because we don't want to be labelled as a joker. Such people aren't taken seriously and most of us don't want that.
Is that anywhere near right? I don't know, but it's interesting. I'll mull it over before looking up some internet opinions.