You don't have time, school is starting soon

You look at the time and realize that school starts soon. You don't have time to jack off! You run to school and make it just in time before the bell goes. There is a new substitute teacher, Mr Johnson (this character is made up), and he is so hot. He is muscular, handsome, has a cute ass and has a big bulge in his pants.

He rights stuff on the board and asks who can answer the question. You are busy staring at his bulge and feel your cock start to rise. You realize if your cock hardens it will break the seems of your pants and everyone will see you get a hardon from a MALE teacher.