First Kiss.

The video linked below is breathtaking.
It's about 20 couples who do not know each other, and they are asked to kiss each other . So simple, and that complex.
In the video we can see a whole recital language of seduction; elusive and furtive glances, shoulder raises, unfinished movements, wet lips, touching her hair, nervous laughter, subtle contacts, approaches, passion, tenderness, embarrassment, discomfort, relief, satisfaction, happiness.

Tatia PIlieva . Citing Websites.Film presented by WREN Studios. Retrieved June 13, 2014, from https://www.youtube.com/watch?v=IpbDHxCV29A

From the point of view of Body Language, denoting the couple's "chemistry" is:

She likes what she sees. The boy feels dominant (much space), likes what he sees and also realizes that the girl corresponds to.



The next couple, denotes passion for the kiss. It is the girl who takes the initiative and begins with the approach. The boy shows a little uncomfortable, and looks away from her and goes to the organization. This displeases her (mouth care).

It is also interesting to see the reaction after the kiss. Some are touching, others "fleeing" others remain expectant to see the reaction of your partner. 

The body language of seduction is a dance. A wonderful dance.