Studies have shown that straight women overestimate the importance of thinness in heterosexual men’s perception of female beauty. That is to say, women think men prefer ladies much thinner . . . than they actually do.
Related: "Why Do So Many Women Wear So Much Makeup?"
The female participants thought the models looked better with slightly more makeup than the male participants did. However, all of the participants thought male observers would want the models to be wearing more makeup than female observers would.
They were wrong—men and women preferred the same amount. And that amount was less than the models had actually applied.