When I was 17, I was attending at 4th grade of a technical institute for telecom technicians. A teacher of mine, born in Southern Italy, was a friendly, cordial, but terribly touchy and vindictive guy.
During a lesson, my deskmate, a tall, sturdy, long fairhaired young man, by big boy appearance, had a vivacious argument on futile subject with this teacher, difficultly calmed down. After about half an hour, he began to feel an increasing need to urinate. He asked the teacher for going to bathroom, but that guy, irritated for the previous squabble and thinking to a teasing, aswered a curt:"No, you may not go!": After a little time, my poor classmate, evindetly unable to hold further, went to the teacher's desk, exclaiming: " I really must go to bathroom, I cannot hold any more!": The teacher denied:"No! back to your place": Then the pupil, exasperated, yelled:"I have to pee very bad; my dick is moaning; I don't want to pee myself like a baby. So I get it at classroom!". He soon went to a corner of the classroom, unzipped his pants, pulled off the dick and was about to pee. Only at this point the teacher, repented of his intransigence, exclaimed:"Ah, have you right to go to bathroom?Go well, quickly!". he then put inside the penis, zipped his pants and catapulted himself to the bathroom....just in time to avoid an accident!