Well, yes and no.I think it is fluid for people who are and who will stay somewhere in between the gender binary, such as many crossdressers. But I don't think there is a personal fluidity for MtF transsexuals, who do see themselves solidly in the female end of the binary. This might explain the strength of opinion, which I agree should be tempered a bit especially in this section of the forum. I've got to say though that CDs have occasionally had strong opinions about such things in the past as well.