Sure, it's convenient, but still....

Why is my knee throbbing? My only guess (so far) is that I've developed creaky joints a la grumpy old people in comic strips that ache with weather changes (hello, snow!) from all those years of sitting on my knees in order to be taller. If it's any consolation to my left knee, I'm sorry for all the trouble I gave you back in seventh grade, if I could take it back I would, and I would really appreciate it if you'd stop aching no matter what position you're in and let me sleep easy tonight. I really don't care to feel changes in the weather enough to not be able to walk up and down the hall without hurting myself.