The man: "Let's keep the quiz. If I answer wrong I pay you 50 euros, if you answer wrong you pay only 5 euros for me!"
The woman: "Okay, you can start to ask."
The man: "What is the distance between Earth and Moon?"
The woman pays 5 euros to the man.
The woman: "It climbs to the mountain with four legs and comes back with three legs, what is it?"
The man is amazed. He search the answer in internet and send text messages to all his friends but he doesn't find out the answer. After many hours he wakes the woman up and pay her 50 euros.
The man: "What is the answer?"
Without words the woman pay him 5 euros and falls asleep again!