^^^thats the short version of the joke^^^
it actually goes something like this
this guy, he is quiet well off financially, has just bought a brand new porsche and is driving out them country roads enjoying his new purchase. there is no cars around so he decides to test how fast and powerful his new toy is. so he floors it 60k, 70k, 80k, 100k
all the sudden there is sirens behind him, but he has a sudden thought, may be he can outrun the cop, so instead of slowing down he keeps going.. 120k, 140k, 170k
but then he realises, he has a great job, on the verge of a new promotion, wage increase, great mansion of a house, a family that loves him, not married so he enjoying a great sex life. so he slows down and decides to pull over.
the cop parks right behind him and comes up to the driver window and says
"thats a great car you got there sir, but ill tell you wat, it has been an extremely long day, i still have to get back to the office and finish all this paperwork, i dont really want anymore work for tonight as its my birthday tomorrow, so you give me an excuse why i should let you off, and if i havent heard it before and you make me laugh then you are free to go
so the guy says " last week after what i thought was 10 years of a incredibly happy marriage, my wife ran off with a cop, here i thought you were trying to give her back!!"