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Old 12-19-2013, 05:05 PM
Spock Spock is offline
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Join Date: Nov 2013
Location: East Bay California
Posts: 134

Originally Posted by london View Post
What study are we talking about? The distance study? No, there were several factors that weren't considered. Even if it is "true" what then? Force cheaters and/or the ethically non monogamous to "dose up"?
The one posted by Dana. Let me recopy-paste my point:
Sexual fidelity is potentially costly for males, and few mammalian species along with humans exhibit it. The hypothalamic peptide oxytocin (OXT) has been implicated in mediating pair bonds in various species, but as yet, we know little about neurobiological factors that might act to promote fidelity, especially in men. Here we provide evidence for a mechanism by which OXT may contribute to romantic bonds in men by enhancing their partner's attractiveness and reward value compared with other women.
And the abstract:
The biological mechanisms underlying long-term partner bonds in humans are unclear. The evolutionarily conserved neuropeptide oxytocin (OXT) is associated with the formation of partner bonds in some species via interactions with brain dopamine reward systems. However, whether it plays a similar role in humans has as yet not been established. Here, we report the results of a discovery and a replication study, each involving a double-blind, placebo-controlled, within-subject, pharmaco-functional MRI experiment with 20 heterosexual pair-bonded male volunteers. In both experiments, intranasal OXT treatment (24 IU) made subjects perceive their female partner's face as more attractive compared with unfamiliar women but had no effect on the attractiveness of other familiar women. This enhanced positive partner bias was paralleled by an increased response to partner stimuli compared with unfamiliar women in brain reward regions including the ventral tegmental area and the nucleus accumbens (NAcc). In the left NAcc, OXT even augmented the neural response to the partner compared with a familiar woman, indicating that this finding is partner-bond specific rather than due to familiarity. Taken together, our results suggest that OXT could contribute to romantic bonds in men by enhancing their partner's attractiveness and reward value compared with other women
It seems clear enough to me.
1) Scientists suspect OXT enhances pair bonding; note the pair isn't to exclude polyamory, but because monogamous pairs are the norm. Nothing examined excludes multiple pairs
2) Intranasal OXT had three effects: bonded women were self reported as more attractive than unfamiliar women. Non-bonded familiar women were viewed as not any more attractive than unfamiliar women. Women other than the bonded one did not trigger any reward response. The self-reported attractiveness was confirmed via MRI via increased activity in the brain's reward regions
3) Hypothesis confirmed; OXT triggers the reward center of the brain when a male sees his partner. The next step then is to determine how the partner can trigger the release of OXT!

I wasn't dissecting the second paper yet.
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