If you’re a geek and you don’t read xkcd, you should be horrified and appalled. You should also now spend the next hour or so flicking through the comics, picking out the ones you understand on the first go and the ones that took you a little while.
The more you understand on the first go, the higher your geek rating. And the sexier you are.
Though this one I just find hilarious. Black Sheep anyone?