Thing Palette Doesn't Understand

1. Why does a razor, which is metal, become dull after cutting hair, which is so much softer than metal? That's like saying knives get dull after cutting butter. WTF?
2. Anything more complicated than basic algebra. There's no joke here, I simply can't wrap my brain around it. The irony is that I can understand extremely difficult mathematical concepts as long as they are explained in English rather than math. I can go on about gravity, and quantum mechanics, and spooky action from a distance, but ask me "Why?" and I can't answer because I lack the mathematical grounding to prove it. Math is sort of an article of faith for me... I know it exists but I can't prove it.
   
3. Pi. No, really. True story: I once told a friend "I don't get the rationale behind Pi." Those of you who speak math are no doubt laughing your asses off at the pun I just made, but I assure you that I was being completely serious at the time.
4. How Vampires replaced ponies for tweenage girls. I remember when liking vampires was enough to get you branded a freak, a weirdo, and have authority figures look at you funny when you walked past because you might be carrying a gun under that coat. I guess this is what happens when fans of Anne Rice have kids?
   
5. Where the past week went. Wasn't it Monday just yesterday? Damn allergy hangovers...