'Cause they're not!
As for the cross-dressing boys, well, that's probably going to be more exciting than Princess Princess to some of you (and less to others, by which I mean Rathany): it's Kuroshitsuji, featuring the young and frequently frilly-dress-wearing Ciel Phantomhive. (And frequently-cosplayed, I might add!) A second season of the anime is set to go, so sayeth 2ch.
Good times all aorund! I'm particularly looking forward to Tatakau Shisho-- if only in the absence of more Toshokan Sensou.