Scientific studies reveal that “Kissing boosts levels of the neurotransmitters dopamine, serotonin, and the endorphins.
Dopamine regulates sexual desire while serotonin and endorphins elevate mood.
Kissing also increases blood levels of the hormone oxytocin, which mediates interpersonal attachment, and decreases levels of the stress hormone cortisol.
As a result, kissing reduces anxiety and blood pressure
Furthermore, research on the physiological effects of kissing “shows that men are more likely than women to initiate kissing with tongue contact.
The reason is unclear, but saliva contains trace amounts of testosterone, the hormone responsible for sexual desire in both men and women.
Researchers speculate that unconsciously men may open their mouths to deliver this hormone and perhaps increase women’s sexual receptivity
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