The differential effects of state and trait masculinity and femininity on body satisfaction among sexual minority men.

Masculine men are more likely to idealise being tall, muscular, and lean. Feminine men, on the other hand, are more likely to idealise leanness. At the trait level, masculinity and femininity have been linked with an unhealthy striving for these idealised traits and body dissatisfaction. However, it is unclear how feeling masculine or feminine in the moment might be associated with body satisfaction. Is feeling masculine and/or feminine associated with a boost in body satisfaction? In the first large-scale experience sampling study of masculinity and femininity (n=25,133; N=530), we find that state masculinity and femininity, but not trait, are associated with increased body satisfaction among sexual minority men. We also find a gender congruence effect whereby the positive associations between state masculinity/femininity on body satisfaction are more pronounced when these feelings align with trait levels of masculinity/femininity. Exploratory analyses revealed a moderating effect of eating disorder history. The associations between masculinity and femininity on body satisfaction were amplified for people who had been diagnosed with an eating disorder. This study presents the first evidence that the links between masculinity and femininity and body satisfaction can be delineated based on whether they are measured as traits or states.