If it really is that important to some, and possible in the forum, then maybe it should be made sometime when the more important issues have been dealed. But does it have to be symbol? Would a simple "male/female/other" work? We already have so much on our profiles and postbit, that even more symbols kinda take it overboard in my opinion. I know that this is not a big deal to majority, but to me it already looks too cluttered.