The infidelity comes when a person betrays the rules must be respected to a certain organization or person, the most common infidelity shown him a couple or a religious organization.
The infidelity originated in the early years of the old world, where men imposed the rules and could have several women, and they are even classified, these were: lovers, women who intimaban with men and who did not live in the house of the lord, the concubines (slaves), who were in charge of the past tasks of the home and the care of the legitimate children of the lord, and finally there were the wives, considered the housewives and watchmen of the concubines, in addition to be the ones that the official sons of the lords brought into the world.
It should be noted that it is not only in love relationships that one is unfaithful. Fidelity exists in most relationships that a person can have, regardless of how they maintain it, since a kind of emotional and trust bond is formed, which makes the two members of the bond not accept betrayals or lies from other.
According to recent scientific studies, people who have the ring finger longer than the index finger tend to be more promiscuous and those who show the opposite are more susceptible to forming emotional ties with their partner, which prevents infidelity, but it is not something that really true in all cases. In some regimes, such as Marxism, men were allowed to be unfaithful and even considered a right, but women were punished in different ways. Likewise, these types of actions are not accepted by the church, as they are examples of moral baseness and little respect.