There is a bus driving on a straight smooth road, but in that bus there is a 65 year old guy constantly wiggling from left to right with no reason.
After a while seeing that, an other old guy (roughly the same age) at the back walks towards the guy, and asks him why is doing that...
So the guy says: well I have been sailing the sea's for whole my life, and am now retired. But whenever i'm on land I feel the urge to compensate for the lack of the sea movement....
So the other guy says: that is the most stupid thing I ever heard in my life. I have been fucking whole my life, and I am not wiggling back and forth all the time now.