Stingy friend’s dirty trick

I told you about a close relative who was stingy.
Once we were enjoying dinner at his home, when he put off the light.
“The TV is on. Why do you need the tubelight?” he asked.
With my scratch-filled specs, I could hardly see. I almost picked up items from my wife’s plate as she was sitting next to me.
Why do I remember that relative now?
Well, yesterday, a miserly colleague’s phone buzzed a Bollywood tune.
Lalalalala….
“Who is this?” he asked and continued, “Oh, professor? You are already in our reception room? I will be there in a minute.”
He turned to me and said: “I do not want to pay for this man’s coffee. Do you have Dhs100?”
Puzzled, I nevertheless gave him the money. He dragged me to the reception room.
After initial greetings, he asked the professor, “Coffee or tea?”
As I looked worrying about my Dhs100, the professor replied: “Coffee, without sugar please.”
My friend promptly ordered coffee and within minutes the canteen boy arrived.
Just when the professor was relishing the sugar-less coffee, my friend asked the canteen boy loudly, “You have change for Dhs100?”
“No.”
The innocent professor kept the cup down and said, “I think I have some change.”
“No, no, no professor. It’s insulting,” the dramatist played his game well.
The poor professor finished his discussion and thanked us for the coffee he paid for. And I got my Dhs100 back.