Did you know that during a French kiss, a man passes testosterone to a woman through his saliva?
Indeed, in studies of smooching styles in men and women, in saliva exchange — whether that’s over weeks or months or even years — trace amounts of testosterone in male saliva raises testosterone levels in the female and therefore increase her receptivity and her libido,” siad Gordon Gallup, evolutionary psychologist of the University of Albany.
Research also shows that kissing (not necessarily French kissing) boosts levels of neurotransmitters like dopamine and serotonin.
It also causes a jump in oxytocin, the so-called “love hormone,” whose release during orgasm triggers attachment between couples; high levels of it in new parenthood also foster lifelong attachment between mother and child.
Source: Healthland Time