set/equity assumes people are logical in calculating relationship decisions
there are many examples of individuals who start very illogical relationships according to set such as people in abusive relationships with little affection
however, as people have differing perceptions about what rewards and costs in a relationships are, set/equity is able to describe range of individual differences in relationships
as relationships enter maintenance phase, physical attraction becomes less important. set/equity may explain this part of the relationship more accurately
set and equity theory are limited because they assume people always want more than their partner, but this isn't true - some people prefer equality or even inequality
