Dave Barry can write about colonoscopies and be entertaining because Dave Barry is funny.
DUMBFUCKS cannot write about colonoscopies because DUMBFUCKS are neither entertaining nor funny. At least, not in ways that they intend to be.
Another difference between Dave Barry and a DUMBFUCK is that one of these has a working knowledge of appropriate social boundaries…
AND THE USE OF VISUAL AIDS!
Oh, look! FAIR USE!