Emotions are strange, complex chemical responses to stimulus...
A reaction to the outside world, in short.
A means for the soul to relay its condition and state of being.
In a way, an exchange of emotions is a way for two souls to communicate.
In they are intertwined, the feeling becomes heightened and the sensations supernatural.
However, for two souls to partake in this exchange of emotions, the body has to express them.
For most, this was the difficult part. Expressing emotions was hard because it meant baring the deepest, darkest parts of one's self to another.
Truly, a frightening thing.
In this moment...
A moment of passion and heated emotions, Cain finally realized why people became driven by their desires.
His senses were heightened thanks to his perception stat being so high. So in order not to be overwhelmed by them, he had to tone it down a bit.