A new study suggests that kissing helps us judge potential partners and plays a vital role in a partner staying around. 'Kissing in human sexual relationships is incredibly prevalent in various forms across just about every society and culture' said Rafael Wlodarski from the Department of Experimental Psychology at Oxford University. Wlodarski and colleagues set up an online questionnaire in which over 900 adults answered questions about the importance of kissing in both short-term and long-term relationships. 'There are three main theories about the role that kissing plays in sexual relationships: that it somehow helps assess the genetic quality of