The student and the teacher

This little boy was at school one day and had to use the bathroom really bad. So he raised his hand and told the teacher he had to use the bathroom really bad. She said ok well let me hear your ABC'S first so he started saying them" A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,,Q,R,S,T,U,V,W,X,Y and Z and the teacher said that's great but where's the P at he said it's running down my leg!