Ever since the 80's, unisex hair-do's seem to be taking over people's scalps, every other decade. This world is becoming increasingly androgynous.
Example:
The 80's had that, with all that teased hair for boys and gals. The 70's started the long hair tradition that carried on to the 80's (especially in the Rock scenes), but then again in the 70s i hadn't noticed indications of men with ultra teased-hair. As far as i know, only the women did that... Farrah Fawcett style, y'know...
The 90's seemed more calm in that regard, even though there were still guys with (non-teased) long hair. The 90's also had many guys crop their long locks to simply short, boy-true do's.
Now, ever since the 00's the Emo look seems to be taking over, and there is an increasing amount of young boys and gals with identical hair-do's.
...Just a thought that recently came to my mind.