Sure it does!
I just don't define virtue the way you do.
dicitonary.com has 8 definitions for virtue, and only one of them is chastity.
Me, I'm not a big fan of chastity. I believe I'm atleast semi-virtuous by other definitions, and I think a few of them are desirable - 'a good or admirable property', 'conformity of one's life and conduct to moral and ethical principles' for example. That has a place in any world.
I think that the old fashioned 'virtuous woman' isn't anything to be strived for, in any world. I'm not saying 'go promiscuity for all!', although I have indulged in stretches of it myself, and although I'm monogamous right now, I certainly don't discount the possibility of more such stretches in my future.
I just think that everyone should enjoy whatever sexual lifestyle suits them.