When the host gives their guest something nice, the host is acting on their interest to please their guest. Or their interest in being a friend. Or their interest in seeing their guest happy. By definition, the only interest you posses is your own, even if that interest is a benefit to someone else.
Only straw-man arguments in economics use self interest to literally mean like “hedonic self interest” or layman’s self interest.
Economics actually does the opposite, the “self interest” is basically “whatever people want”. What do people want? They want to maximize their utility! What is utility? Whatever people want!
Only straw-man arguments in economics use self interest to literally mean like “hedonic self interest” or layman’s self interest.
Economics actually does the opposite, the “self interest” is basically “whatever people want”. What do people want? They want to maximize their utility! What is utility? Whatever people want!