I believe it is real, but not in the way most genderfluid people would describe it. You see, gender is a spectrum with male and female at opposite ends, but I feel rarely is someone "only male" or ""only female". Females and males can have both masculine or feminine qualities about them. So I think, it isn't weird to be genderfluid because if you think about it, everyone has qualities which may be seen as belonging to the opposite gender.