“…Male idols are expected to be thin but muscular (Pope et al, 1999), while female idol always receives an expectation of being 'thin and light' in body shape and weight (Jackson et al, 2021;Monocello, 2023). Under these aesthetic tendencies, men experience their muscles as ornamental, while women are dissatisfied with their normal body and always aspire to be thinner and slimmer (Hoodbhoy et al, 2015;Jackson et al, 2021;Kim and Han, 2021). For example, the ' A4 challenge, ' which means a person can completely hide their waist with a width of 8.27′′, has become a social media expression of a slim body.…”