During work, Kevin and James were chatting:
Kevin: James, I've been attending night classes for 5 months now and I have an exam next week.
James: oh!
Kevin: For example, do you know who is Graham Bell?
James: No
Kevin: He's the inventor of the phone in 1876; if you take night Courses you would know this.
The next day, the same discussion took place:
Kevin: Do you know who Alexander Dumas is?
James: No
Kevin: He's the author of "The 3 Musketeers", if you take night courses, you would know this.
The next day, once again:
Kevin: And do you know who Jean Jacques Rousseau is?
James: No
Kevin: He's the author of "Confessions" , if you take night courses, you would know this.
This time, James got irritated and said: And you, do you know who is Yevgeney Kafelinkov?
Kevin: No
James: He's the guy who's having sex with your wife!! If you stop night courses, you would know this