Why do people kiss?

Well people kiss to show how they feel about someone or each other and it's usually leading up to a relationship.

People kiss each other because they show each other how they fell about one another(express your fellings) Try kissing in the rain :] Start a relationship with each other,go on dates have fun:] Also---To get them in bed :] Duh! No one is quite sure, but it's thought to probably be related to a primitive practice where a child's parents would introduce it to adult food by chewing the food up themselves and then giving it to the child by kissing.