The matching phenomenon purports that preferring a long-term partner who is similar to oneself in looks (and other qualities)reduces the chances of either rejection or dissatisfaction.

The matching phenomenon theory suggests that people tend to look for partners who share similar qualities or characteristics, such as attractiveness, personality, or interests. This is believed to reduce the likelihood of rejection or dissatisfaction in a long-term relationship. Therefore, the statement "preferring a long-term partner who is similar to oneself in looks (and other qualities) reduces the chances of either rejection or dissatisfaction" is true.