For me, Sensitive Pornograph. Who knew there'd be gay sex in that one?
Okay. For my REAL answer I have to second this Anon:
>>1168187All the guys into anime at my school would always go on and on about how goddamn manly the show was and how Guts/Gatsu could bang any chick he wanted. So needless to say I was floored by the amount of homoeroticism there was in the series.
. . . Although, in hind sight, I probably shouldn't have been too surprised; they also thought Gundam Wing was a MANRY anime.