Japanese lesbian catfighters are big on spitting. You don't see it much among American and European catfighters.
Spitting could be a last ditch effort by the losing woman to establish her supremacy over the winning woman. An act of utter desperation. But it can also be that a feisty woman who is intent on winning by any means spits on her opponent right at the beginning of a fight to unnerve her completely.
What do you all think?