Actually, it has grown on me. When I first saw it in an Ann Coulter article it jarred me. Then I flashed back to childhood, remembering the childish name calling that takes place at that age. If course today, children use words that are much more vulgar than penis head, having been exposed to every imaginable vulgarity practically from birth. But the term penis head has a certain quaint ring to it. It is name calling from a more innocent age.
And
in view of the ad-hominem attacks that are generally made on the intelligence, and even the sanity of people who have faith in a Creator, it fits. Does it bother you?
Methinks you mistake comments upon the intelligence of creationists with attacks upon people of faith. T'ain't the case. Many of us evolutionists are firm believers in the Almighty. However, we refuse to reject the evidence that the life around us is the product of descent with modification. And, truthfully, we don't see any contradictions in these views.