The argues that we get the greatest payoff at the least cost by choosing a mate who is very much like ourselves.

matching hypothesis            

Explanation:

The matching hypothesis refers to the popular theory in behavioral social psychology introduced in 1966 through Walster et al., it explains that people get attached to each partner. This says that individuals are much likely to develop lengthy-standing associations with someone who is just as conventionally attractive as they can be.

Successful married people of different physical attraction may be around each other attributable to many other corresponding factors, which offset for the desirability distinction. Some males with social status want younger, somewhat more attractive girls for example. Many women prefer to ignore physical appeal of men who have wealth and power