Board Thread:Questions and Answers/@comment-183.171.124.177-20200510102150/@comment-29325824-20200510102822

Well, for starters, you have to understand that Spirit Energy and Demonic Energy are both two sides of the same coin. Yin and Yang, positive charge and negative charge.

But while Mamono do get stronger by absorbing SE and converting it to DE, it's partially because they're female. See, in the MGE, females and males uses SE differently; males have more internal reserves, but absorb less from their surroundings. Females cannot produce as much themselves, but can absorb far more; hence why usually only women can Monsterize.

That being said, while men cannot absorb DE like women can, continueus exposure to it does cause their bodies to start producing more SE than usual. Hence how DE can cause both males and females to grow stronger than they'd usually be.