The top of his head is frequently and understandably mistaken for someone's rear-end when he is submerged, misleading people into wanting to "tap" it. (literally lightly smack it with their hand.)
Given the combination of his bizarre swimming habits and his misshapen head, one would be forgiven for assuming that he intentionally puts himself in these situations; although he appears to be angered by other swimmers touching his head against his will.
There has only been one appearance of Asshead to date, and it is not likely that he will appear again. He has no direct connection to the Weed Bro canon, although they are possibly related given the shared obnoxious textboxes.
Asshead has no known relation to Dickface.