Abu El abed..Again

During work, Abou Abed and Abou Stef were chatting:

Abou Abed: Abou Stef, I've been taking night courses for 5 months now and I have an exam next week.

Abou Stef: Bahhh

Abou Abed: For example, do you know who is Graham Bell?

Abou Stef: No

Abou Abed: 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:

Abou Abed: Do you know who is Alexander Dumas?

Abou Stef: No

Abou Abed: He's the author of "The 3 Musketeers", if you take night courses, you would know this.

The next day, once again:

Abou Abed: And do you know who is Jean Jacques Rousseau?

Abou Stef: No

Abou Abed: He's the author of "Confessions", if you take night courses, you would know this.

This time, Abou Stef got irritated and said: And you, do you know who is Abou Ali el Zernbewi?

Abou Abed: No

Abou Stef: He's the guy sleeping with Em Abed, if you stop night courses, you would know this!!