We tend to get so flustered when we're insulting someone, it's hard to tell what the right thing to say it is. Should we tell them to eat it, suck it, bite it, kiss it, lick it, or have sexual intercourse with it? And what do we want them to eat, suck, bite, kiss, lick, or engage in intercourse with? Our buttocks, our genitals, excrement, or themselves? Do we want them to do it here, or do we want them to go somewhere else and do it?
I find it is helpful to create an outline of what kinds of insults work for what situations. The reason why it is important to create an insult outline is that it makes it a lot easier to create a file folder system containing the following: diagrams; sample interactions; future insult strategies and schedules; and detailed descriptions of the behavior of not just enemies, but also friends and family members, total strangers, and neutral acquaintances; to better guide insult-driven interactions.
Oh, and one other thing: bite my ass.