What happens when you ask strangers to kiss? Or undress each other?

"First Kiss" a film by Tatia Pilieva
http://www.harpersbazaar.com/fashion/wren-first-kiss
http://vimeo.com/88671403

It's really hard to explain, but this made me cry a little.

Is it really impossible for human beings to kiss (or engage in other sexual behavior) without being in love? Are we in love at least for that moment when we are having sex?

"Undress Me" a film by Tatia Pilieva
http://www.harpersbazaar.com/culture/reviews/first-kiss-video-sequel-undress-me?src=spr_FBPAGE&spr_id=1447_70792337

http://youtu.be/pKZa-Kb4Nng

Youtubers React to "First Kiss"
http://youtu.be/WC9_bcbDxwM