The Chemistry of Kissing

The reason that kissing feels so pleasurable is that it sparks a surge of hormones in our brains, according to new research.
They found that kissing reduced the levels of cortisol, a stress hormone, in both sexes. But levels of oxytocin, a hormone linked to social bonding that they expected to be boosted by kissing, only rose among the men.
"This study shows kissing is much more complex and causes hormonal changes and things we never thought occurred."
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