Why We Suck: A Feel Good Guide to Staying Fat, Loud, Lazy and Stupid is a 2008 book written by actor and comedian Denis Leary.

During the show he mentions he wants to write a self-help book entitled "Shut the Fuck Up, by Dr. Denis Leary", with the "advice" being telling the people seeking help the one thing no one has ever told them to do ("shut the fuck up"), which he believes would help people more than actual advice.

In the book, Leary wrote:There is a huge boom in autism right now because inattentive mothers and competitive dads want an explanation for why their dumb-ass kids can't compete academically, so they throw money into the happy laps of shrinks... to get back diagnoses that help explain away the deficiencies of their junior morons.

I don't [care] what these crackerjack whack jobs tell you – your kid is not autistic.

Or both.Leary later stated that the quote was taken out of context and that in that paragraph he had been talking about what he calls the trend of "unwarranted" over-diagnosis of autism, which he attributed to American parents seeking an excuse for behavioral problems and under-performance.