It was a summer evening. You went to a cafe to buy yourself a coffee and a couple of sweets. At the last moment, when you were already taking out your card and preparing to part with your last money in any case, some tall guy from the queue gives his credit card instead of yours, paying for your order with a smile. He looked at you slyly as he spoke.

"Why does such a beautiful girl pay for coffee by herself? Don't you have a boyfriend?"