I find it to be extremely sad how little there is written about the history of men in Androgynous pretty boy style (a mix of traditionally masculine and feminine clothing/hair/makeup to create an ambiguous albeit still distinctly male-leaning style).
I very much hope that the popularity of K-Pop will encourage young men (whether straight or gay) to embrace this kind of style (though this style is already popular in the trans community).
Here are a few important aesthetics/movements listed by time of origin (whether they have yet been listed or not) that would not have existed without these rebels of fashion:
1800s - Dandy
1960s - 60s Dandy
1960s - Hippie
1970s - Glam Rock
1970s - Bishie
1980s - New Romantic/Blitz Kid
1980s - Trad Goth/Batcave
1980s - Deathrock
1980s - Woodland Goth
1980s - Hair Metal
1990s - Visual Kei
1990s - Metrosexual
1990s - Onii Kei
1990s - J-Pop
1990s - Aristocrat
2000s - Ouji
2000s - K-Pop/Khonminam
If anyone can think of more to add to this list, please let me know.