It's behind the bike sheds or school disco, it is very probable that you keep in mind your first kiss with a romantic partner even lose their virginity.

The researchers said that most of us keep in mind the 90 per cent of the details of the experiences more vivid than the memory of losing her virginity, reports the Daily Mail ..

But, the art is so complex that scientist Sheril Kirshenbaum has written a book about it.

In 'The Science of Kissing: What Our Lips Are Telling Us', Kirshenbaum writes that men see kissing "as a means to an end" and possibly with a "view to swapping other bodily fluids later",

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 transmitted through kissing stays small but common sessions in the body longer and can push a woman who fall in love earlier.

The author, a researcher at the University of Texas, has precise the magnetic current in the brains of men and women in reply to images of kissing.