Well, yeah. That and they're an effective way of killing time. Though if that was the only reason for doing them no one would bother posting results for others to read.
We humans are built to compartmentalize. We see, hear, and think too many things to process all at once. We want reality in small, easily digestible doses, from the proverbs of ancient times to modern catch-phrases.
And we all have some desire to see ourselves as others see us, which is why mirrors are so fascinating to us...but even the best of them show only partial, distorted realities.
I had a point, but I lost it. I'm up too late. ^_^
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