Listen, sharp pencils are a good thing, they work better. And when people borrow erasers (or anything, for that matter), they never come back the same way. You're not OCD, just particular about your things.
OCD is a debilitating illness characterized by crippling, irrational thoughts (Obsessions) and/or behaviors (Compulsions). The key is irrationality, as in psychotic. I'm not hearing anything in this thread that';s the least bit psychotic. Or irrational. Don't confuse being fussy or particular about things with a psychiatric disorder!