See, the discrepancies in acceptable fashion that bars males from more outfits than females is precisely why there is a lobby of "Just make the female gears unisex too." There really is no reason that a girl can't wear something just as good or even better than a guy - add a bra and any shirtless option is completely acceptable... I have a butch female character that I roleplay and thinking on her wavelength all of the cutesy female styles are disgusting.
On the other hand, I have a male character that loves skirts and showing skin, and if female outfits became available, I'd definitely consider the options.
Spring dress? Drop the big bow and flowers and instead make it a simple sash with the ends hanging loose, and maybe tone down a few ruffles and make it an open collar top instead of one that drapes the shoulders. - Makes it more masculine with minimal changes.
Bunny Outfit? Make the top a vest and remove the bows from the shoes and the tiara from the bunny ears. Voila, more masculine.
Thavnairian Bustier?
There's a whole thread of options.
Just because the base concept is feminine doesn't mean it can't be tweaked to suit males. Please give us more options!