Editing Monster Girl Encyclopedia II (section)

=== Essence (p16) ===
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Essence is the life force found in individuals of non-monster races, including humans - especially men. It is, effectively, human mana. Men's semen and saliva contain large quantities of essence, which monsters absorb through sexual congress with human males, enjoying its taste with their mouths, genitals, and other regions. It is the daily bread from which they convert mana in order to become more powerful.

The taste of essence, as monsters perceive it, heightens in tandem with their desire and love for their partners, their monstrous bodies gradually optimizing in order to savor and absorb their husband's essence most efficiently. And rather than tiring of their beloved's human mana, they instead only ever seek it with growing intensity. Conversely, they develop a loathing for the essence of other men so that it tastes flavorless or even vile.

Monsters are highly sensitive to the scent of essence; they can identify individuals by it and even use it to track down specific men. It should also be noted that the bodies of human men produce essence internally via food and sleep. Even if a man is wrung dry by a monster, even if exhausted to the point of unconsciousness, he will not die.|bgcolor = #cac6bd}}