An old man about 60 married a young girl 22. The first year of their marriage they had a baby and when they went to hospital for delivery, the nurses said the old man, at this age, I don't know how you do it?. The old says to the nurse "I have to keep my Motor running". The Next year same thing happens, and the nurses asks the old the same and he says again "I have to keep the motor running", the third year the same thing and you guessed right the same nurse asks the same question, and old man says the same answer except this time, the nurses says back to him "I think you have to change your oil because this one is "BLACK"..
Peace