Why is the plug so sad?

It is a well-known fact that everything not found in nature is designed by someone. But what were they thinking when the three-pronged plug was designed? The recepticle looks so sad...or disappointed for being something so useful. The plug, after all, is the conduit to power--to usefulness. It converts passive potential into active energy. It is a conduit to warmth and cooling, of light and sound, of motion and entertainment. The "mouth" should be turned upward to express joy of being so useful to so many. Wouldnt it be great to see plugs everywhere that look more like the 1970s "Have a Nice Day" smiling faces than the current sad sack we have to endure? Why is the plug so sad?