Call me a snob, but I've always had the feeling that if you could hear what other people were thinking, it might not be all that interesting.
And boy does Twitter prove me right.
Look at this chart of trending topics from last week, and you'll see what I mean. Britney, Bieber and the Superbowl were all hotter than a hot thing.
At least Egypt managed to scrape in, proving that the Twitterati can see a little further than their own navels, provided the topic's already on television a lot.
But generally, it looks a lot like the conversations you might hear in a not very interesting sixth form common room or the canteen at TopShop.