Lemmy's tail is treated as a separate part of himself, as if it were its own being with its own separate personality. "He" has his own name, Norville, and is sometimes accessorized with head-wear (or some other accessories), instead of Lemmy wearing the head-wear (or other accessory) himself.
Norville performs many actions, such as curling around others or patting them on the back for comfort. Some actions may contradict or impede an object of Lemmy's, or be generally impulsive seemingly without Lemmy's volition, similar to Alien Hand Syndrome.
Norville tends to be independently attracted to female tails which are also big and fluffy. Norville reacts in some manner, such as vibrating, growing bigger, and getting fluffier, in reaction to his attraction. He also tends to be jealous of male tails that are bigger or fluffier, and will sometimes grow or become fluffier so as to show dominance or intimidate the other tail.
The markings on Lemmy's back represent a lemniscate, and refer to Lemmy's nature as a "polar function." This aspect is explained as his ability to "modify his parameters" to change attributes about himself, such as his species. This is implied to take a lot of focus or concentration, and so comes with limitations.
It is unclear if this is actually possible, or just "child-logic" and imagination at play. He does not appear to do this very often, and does state that he prefers to be a spotted skunk.
Lemmy appears to speak in a child-like language he created, called Skoonkenkieli. The exact rules of the language are unknown, however much of it appears to consist of just adding "-en" onto most English words (such as "handstanden"). It also tends to replace the letter u with oo; which is how "skunk" turns into "skoonken."
However, there appear to be some original words, such as "skoonkenlint" being the term for a baby skunk.