In need of mental health:

When I bring up a performance issue to you I am SO not interested in hearing "So and so does such and such and you don't say anything.  I'm being singled out."  This is NOT #$&(* elementary school and I don't want to hear that crap.  We are discussing you and YOUR performance failures, not anybody else in the company.  Be an adult!

Rant over.  Thanks, I feel better now!