Teacher offers to give private lessons to a boy

The mature teacher knew what he was doing when he offered to teach private lessons. there were several boys whom he decided to take to his own house to teach them some lessons. but it wasn't about studying, rather it was life and sex lessons. all the boys were between 19 and 20 years old, they were university students and they had in common that they did not pass the course whatever they did. there was only one thing left to prove, and that was to put this man's ass, that is, all the boys with whom he fucked and had sex passed the subject with good marks.