>16, maths class, substitute teacher
>decides to use "show me" boards that kids use
>he asks us a question, you write the answer on the board and hold it up, you get the idea
>he walks out of the class for a minute, I tell the guy next to me that everyone is going to draw a penis next time
>he lols and agrees to join in - he doesn't want to be the only one not doing it
>the next question gets asked, I watch him draw a very detailed penis
>he holds his board up
>the horror on his face when he looks round and notices no one else has done it