>>9243316Well hard question as expressing joy change to specie to specie
Maybe it is random, but some expressions are universal, aggressiveness for example:
>Tension of entire body(getting ready to do and receive damage)>Blood starts flowing to were it must to a fight(that is why common puking and shit like that)>Eyes open and locked on target>Mouth closed really tight(or really open if you intend to use as a weapon)Basically shaping your body as an armor and the certain parts as a weapon(in humans we usually close hands[not in some cultures] and almost universally mouth[to protect teeth and shit])
If you look closely an smile of amusement is the opposite of that...
>Your body usually gets open and relaxed>Teeth are showed(except in asia)>Palms are open>Usually break visual contact>Eyes will close a little bit or completelyBasically you get pretty accessible to an attacker, the difference between an tension laughter and an empathy/amusement
Is that you were stressed and are using laughs to release the stress, but everything pretty much remains the same
