Women can be greedy, heartless, heroic, pure, depraved, debased, debauched, healing, harming, or anywhere in between, just as easily as men. You don't have to be a particular type of character just because you're playing a woman. I happen to play with a group that is quite flippant about role-playing sexual encounters. Heck, half the time the party is joking about casting a charm on a beautiful PC to make her strip for them. We're not debased, juvinile, or perverted any more than a sitcom would be for talking about sex or nudity.
Fantasy is an escape from reality, in any form.
If a man plays a woman character, there is that much more escapism involved, since I doubt any person of one sex can really fully understand and appreciate the other. In closing, let me say that guys who play girls don't need advice on what to do and what not to do. Women don't have to be the strong, solid warriors you depict them to be. Let people play the character they want to, regardless of gender roles. It has a very mature touch to it, and I'm very glad that it stresses how a female character in a game ought to be - especially about female warriors.