soo true  suppose you are about to go to bed and you turn the light offyou might have an undesirable thought and you turn it on and off time and again just to get it rightno matter if switch becomes free  if you are sleeping in bed inside your cozy and warm quiltsuddenly you get the feeling that if you do not touch the feetsomething inauspicious will happen and you have to touch the cold floor with your feet and no option but to disturb your sleep