Under My Nose

I step out of the computer lab for two minutes to eat a few bites of my breakfast sandwich and when I return, my chair is gone.  My books and papers are still here, the monitor on, and the seat probably still warm.  Of all the chairs to steal in the lab (and there are plenty this morning), why steal one that you know someone is sitting in? I hope the butt grooves that I made prove uncomfortable for my chair thief.  That's probably unlikely.  I make such nice butt grooves.