I think I have figured Bob out, here's my theory: 
  
Bob is a LMP, (and a damn good one from what I hear) and thusly, spends all day rubbing people the right way. 
  
(Can you see it coming?  ) 
  
It would follow, then, with all of that right-rubbing, there must be some balance forthcoming. 
  
And that, my fine-fingered friends, is why we all rub Bob the wrong way.  
We balance him so he can continue his right-rubbing to those who need it. 
  
Here it is proven: