And this is a manifestation of the instinctive fight over a female, common in animals. ‘Otpor’ instincts Although unnatural, but in a society is justified, because, for example, physiologically optimal combination of two individuals guarantees only physiological perspective pairs – the best offspring. Social same perspective, such as marital happiness and conjugal love is a natural optimization does not guarantee the contrary – the socially closer dear and more likely their harmonious marriage, the more likely they are genetically and similar origin. Therefore the choice of the pair in a relatively narrow range, where most are distant relatives may have a negative impact on offspring mass birth defects. A couple of more than origin, which guarantees the best ‘quality’ offspring, the harder they harmonize their relationship in marriage. After all, socially distant halves of a pair that is problematic – national, clan and social differences create a lot of noise for the mental approach, without which the marital harmony is impossible. In addition to an unconscious mate selection at the genetic level, “triggering the biochemical mechanism of ‘natural love, there is also the same unconscious, but a social choice.
This choice is imposed ideals prevailing in the society. Recently, more and more exposed to idealized body, his so-called sexy, challenging the call of sex – animal urge to mate. And who can be selected by this criterion? Only sexual partner for a while, until it encounters a sexual partner. The victims of the imposition of primitive ideals of society are, in general, those with low levels of development and an unstable psyche – schizoid personality, particularly prone to fanaticism. Sometimes there is even a natural fans love to a stranger in person idol, and it is very similar to unrequited love, often with even more ‘obsession’ on his idol and jealousy toward him. Then ‘biochemistry effects on mental health’ is not ‘constructive’, as was intended by Nature, but this is a topic for psychiatrists.