A kiss is a classic sign of affection.
But for as simple as this gesture is, there is a lot that can go wrong when you're kissing someone.
a 2007 study of over 200 people IN THE JOURNAL OF EVOLUTIONARY PSYCHOLOGY asked: "Have you ever found yourself attracted to someone, only to discover after kissing them for the first time that you were no longer interested?"
It found that over 60% of people have had this experience.