People are more likely to remember their first romantic kiss with their partner than about their sexual experience, according to a study.
Scientists have claimed that most of us can recall 90 per cent of the details of the experience-a memory more vivid than losing their virginity, reports the Daily Mail.
But, the art is so complex that scientist Sheril Kirshenbaum has written a book about it.
Women try to "extricate the significance of a relationship based on a single kiss and often that leads to miscommunication."
Men are more aggressive kissers, as they are trying to pass on a "testosterone bomb" to a lover.
However, testosterone passed on during sessions of smaller but frequent kisses stays in the body longer, and can push a woman to falling in love more quickly.
The author, a researcher at the University of Texas, measured the magnetic current in brains of men and women in response to images of people kissing.