"Jealousy can even be good for love. One partner may feel secretly flattered when the other is mildly jealous. And catching someone flirting with your beloved can spark the kind of lust and romance that reignites a relationship."

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You will notice that what we are aiming at when we fall in love is a very strange paradox. The paradox consists of the fact that, when we fall in love, we are seeking to re-find all or some of the people to whom we were attached as children. On the other hand, we ask our beloved to correct all of the wrongs that these early parents or siblings inflicted upon us. So that love contains in it the contradiction: The attempt to return to the past and the attempt to undo the past.

— Woody Allen