Exactly. A health ass lacks a hemorroid. A hemorroid is an ass defect. To call someone an ass is in fact calling them something better than a hemorroid.
Typically, if someone calls you a name in response to what you called them it is supposed to be worse, is it not?
For instance, you call me an a**h*** and in response I call you a shoulder.
Clearly a shoulder is less severe an epithet than an a**h***, leaving one with no option but to believe the shoulder caller (Keith) is clearly an idiot.
(this has to be my worst post on FR yet and that’s saying something)