You nailed it. Masculinity and femininity are not innate qualities of being male or female. Everybody possesses a mixture of so-called masculine and feminine characteristics but men in particular are encouraged to suppress their "feminine side." See The Mask You Live In. This was especially true in the working class environment I grew up in where machismo ruled supreme and being seen as a sissy was a potential death sentence. But, you can't suppress it forever. Sooner or later it has to come out. Crossdressing/crossdreaming, albeit a distortion, is a fairly benign way to attempt re-connection with the part we've tried to suppress.
