(Joke) the mechanic dad and daughter

Once upon a time a girl named benz asks her Mechanic father named jack,
“Dad, there is something that my boyfriend said to me today, that I didn't understand. He said that I have a beautiful chassis, lovely headlamps, soft looking airbags and a fantastic bumper!"

Mr jack quickly answered and said, “Listen carefully girl, and go tell your wheel barrow, weed smoker stupid boyfriend

that if he dares opens your bonnet and tries to check your oil with his dip-stick, I will violently pull down his crankshaft and tighten his nuts soball-bearings hard with a rattle gun until his ball-bearings pop out of their sockets

and he will start leaking oil and other fluids out of his rear exhaust pipe !
When am don we would know who is the real mechanic