Wth? You BIT me!

Ok so my friend forced me to run through the sprinklers at our school with her. I ran through them with her (mind you,we're freshman in high school so everyone expects this from us) ,got completely soaked, and went to go stand under the roof where it's warmer. My friend comes up behind me and BITES me. So i turn and bite her on the arm. And that is the start of an epic biting fight.Right before the bell rings,she bites the main muscle in my writing arm. I couldn't write normally for the next 2 hours lol. People these days