Intelligence = loyalty?

Researchers from the London School of Economics believe that marriage between men and their loyalty to the intellect there is a clear link. According to them it appears that the more intelligent than the spouse, the less likely that it will change its "other half».

As explained by the British researchers, the thing is that intelligent men subconsciously consider monomagiyu most beneficial and safe option between a man and a woman.
According to scientists, monogamous relationships of boys relieve the stress associated with finding new partners, and keep his sexual and nervous system healthy.

Previously, German researchers found that the hormone oxytocin helps married men to be faithful to his beloved. Conducted their experiment showed that under the influence of this hormone family man trying to stay away from strangers, even if they are very attractive.
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PS. The thesis is quite controversial. Either I do not quite understand it correctly, the term "intelligence"