80yrs old grandpa calls the radio...

"Hello, I'd like to participate in the game!" he says.

"Wonderful! There are three questions, are you ready?"

"Of course!"

"First question then. What is it: it has two wheels and you can roll on it?"

"A bike!"

"Not bad, but we were thinking about a mountain bike, to be specific. Next question. What is it: it has four tyres, a steering wheel and an engine?"

"A car!"

"Not bad, but we were thinking about an Audi, to be specific. Last question, but you really have to answer correctly this time! What is it: it has wings, an engine, works with kerosene and you can fly with it?"

"A plane!"

"Not bad, but we were thinking about a Concorde, to be specific... Unfortunately, you didn't win, sorry. Maybe next time!"

"Can I ask a question too?" asks the grandpa.

"Sure."

"What is it: stands in the street and sells her body for money?"

"Well, I'm pretty sure that's a whore..."

"Not bad, but I was thinking about your mother, to be specific."