Attraction is a process in which two people interact, one person transmits verbal, visual, or other stimuli, and on the other hand, the other person responds more or less positively to the stimuli. Reciprocal liking can affect our choice of whom we have relationships with, including romantic, sexual, and platonic. According to the reciprocity principle, people tend to favor the potential partners who return the interest. Experts have claimed that when people select potential mates, they look for someone whose status, physical attractiveness, and personal qualities are about the same as their own. According to a theory, a person will select a potential partner who will better his or her self-image or persona. Researchers acknowledge a set of flirting behaviors, that have been employed by both sexes to attract each other. Conversations that are started by romantic attraction are typically light and include laughter. There have been years of research that have established many principles of attraction, one being an experiment by Aron and his colleagues, conducted in 1989, that found that most people repeatedly mentioned reciprocal liking, personality, and appearance as factors that influenced them to fall in love. People are naturally more attracted to those who express positive emotions towards them and simply knowing that someone is attracted to them can induce this reciprocal interest.