r first kiss is not just the first display of passion, but it is also a kind of screening process to discover whether a potential partner is compatible as a mate, according to scientists.The researchers claim that the touching of lips is a “biological” quality control strategy for “mate assessment” which has evolved over millions of years. Kissing also triggers certain hormones that reduce stress, increase attachment between a couple, and boosts the sex drive.
According to Helen Fisher, professor of anthropology at Rutgers University, New Jersey, men subconsciously use a kiss to gauge levels of oestrogen and in turn fertility.
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