We were in maths class doing a very mathematical maths test. My friend got very turned on by the maths on the page so he made a penis on the calculator and started rubbing one off in class. He was wanking for about 10 minutes until we all heard a loud "UUUHUUUUH YEA" HIS CUM WAS ALL OVER THE CALCULATOR. He tried to deny it saying his dad did it but we know math makes him cum. "Calculate and ejaculate" - friend.