Washington: Men in committed relationships who are given the hormone oxytocin choose to keep distance from attractive women they have just met, according to new research.The findings suggest oxytocin may help promote fidelity within monogamous relationships.The hormone, which is produced in a region of the brain called the hypothalamus, is also involved in the formation of social bonds. In humans and other animals, this brain chemical is known to promote bonds between parents and children, and between couples.In the current study, led by René Hurlemann, MD, PhD, of the University of Bonn, researchers found that men in committed relationships who were given oxytocin kept a greater distance when approaching or being approached by an unknown woman they found attractive compared with those given a placebo. In contrast, oxytocin had no effect on single men.
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