Emotional dependency in marriage is conditioned by social attitudes and upbringing in most parts of the world.
Emotional dependency in marriage is characterized by fear, which may be expressed in a number of detrimental ways, such as hostility, domination or submission. It is a result of emotional immaturity and since the couple may mature differently and at different rates, conflict may arise later. One partner may become too assertive and if the other does not submit, he or she may seek satisfaction outside the marriage and contribute to its breakdown.
The idea of marriage itself connotes dependencies of various kinds - financial, physical, intellectual, social and emotional. These "dependencies" may simply be the healthy expression of the need and ability to share.