The stereotype that a man does manly stuff and a manly man/macho man is not into girly stuff unless he likes men. Also in the public view of things like social interaction ,men dress up as women to attract men.
Its simplifier to define a man as gay who crossdresses.
Men who like transsexuals as gay is simplier.
There is an article called
The chaser chaser
Defined as gay men who dress up as TS/CD to attract men who want a CD/TS.