Where's the p?

Kid: Teacher can I go to the bathroom?
Teacher: You have to say your ABC's first
Kid: Ok,
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
Teacher: Where's the p?
Kid: It's running down my leg!!