a fun story: just three years is the tipping point where couples start to take each other for granted. so Romeo and Juliet is a false imagination.
http://www.reuters.com/article/2011/03/08/us-couples-survey-idUSTRE7276UF20110308
http://www.salon.com/life/feature/2011/03/09/three_year_glitch
I guess they should spell Love as luv, a letter for each year of it :)
a possible related story, the "Coolidge effect"
in the time of US president Calvin Coolidge, The President and Mrs. Coolidge were being shown [separately] around an experimental government farm. When [Mrs. Coolidge] came to the chicken yard she noticed that a rooster was mating very frequently. She asked the attendant how often that happened and was told, “Dozens of times each day.” Mrs. Coolidge said, “Tell that to the President when he comes by.” Upon being told, President asked, “Same hen every time?” The reply was, “Oh, no, Mr. President, a different hen every time.
it is a genetic error and knowing that, when we feel bad just say: this is natural, and not our fault, so we can live normaly
in a movie by the great "jack nicholson" they show this in a dramatic way, but when his wife (in a movie) died by accident he was too sad.
http://en.wikipedia.org/wiki/Coolidge_effect