You'll notice how the entire tone of the fight changed once the lighter haired girl got a good grip on the darker haired one's pussy. The darker haired one who had up until that point been the aggressor and was totally ruling the other girl all of a sudden panicked when the girl who had been taking a beating grabbed her pussy and started squeezing. The dark haired girl was down and not even fighting back for the entire time the girl had her by the pussy. This is a classic example of what we were talking about in another thread not long ago.
It's difficult to attack a girl's pussy but if she spreads her legs and leaves it vulnerable, you go for it.