1. USA: say "I love you", kiss passionately.
2. France: French kiss while rubbing each other's butt.
3. Vietnam: blink eyes at each other repeatedly until one gets tired and gives up.
4. Japan: bow their heads while oscillating their tongues.
5. China: make high-pitched bird calls while doing Tai-chi.
6. Cambodia: dance with their hips opposite each other until the male's sarong falls off.
7. Nepal: Nod their heads from side to side in a synchronized way until one gets dizzy.
8. Russia: flap their thighs to their national anthem.
9. German: exchange fake, little mustaches.
10. Ireland: dance in kilts WITH underwears on, unlike usual.
11. Sweden: give naked massages.
Actually, the research was done by Gay Confucius. So, believe at your own risk.