I dont see what is wrong with listening to Ayu. Im a guy. But wasnt it completely normal and half expected in North America for guys to have posters of Britney spears plastered all over their walls? So whats the difference withi Ayu. If there was a guy obsessed with another guy artist i'd find that weirder. I think i'd be more feminine for me to drool over a poster of Justin beiber of some other male idol than Ayumi hamasaki who is not only attractive but makes amazing music. Its really stupid. I'd never even though that listening to ayumi made me feel feminine until i saw this thread. Female singers also make their products marketed towards male. Otherwise Ayu would have never made things such as Sparkle or Startin in which she's wearing spandex suits that show her body off, cuz girls arent interested in that. Its the guys they were trying to attract with that kind of advertising. 
Ayumi Hamasaki is for all! <3 

 i love ayu XP