Jealousy is a fear of losing power. Actually all the people have always been striving for some power. However, finally you have to pay for everything you get in life. In the same fashion fear of losing power is the price you have to pay for your domination. This is why jealousy is familiar to most of the people who somehow or other are seeking domination over others.
Jealousy can be compared to cowardness: it is not an elevated feeling being a proof of love, but rather a permanent diffidence and fear of being unable to maintain domination over the object of love. Some people try to protect themselves from jealousy by choosing an originally intimidated, humble and useless person as a match. They prefer him or her to possess all of the above properties, only to be sure that it would prevent them from the fear of loss. Anyway, even this precaution doesnt prevent them from experiencing a feeling of jealousy, as this feeling is an unconscious reflection of their own weakness. The more the perception of his or her own inferiority, the stronger is the potential jealousy.
Psychologists have noted that very often men tormenting their wives with jealousy are not faithful...