Do we know that when we are in a bad mood it can be contagious like throwing a pebble into the water that is cam it will cause ripples and spread out.To stop this effect from happening you have to not throw the pebble and there would be no ripples to spread.If we are more conscious about our moods and how it would affect other people we would be more vigilant of that. If that were so it would not be like that pebble hitting the water.Gary F Evans...