I only recently learned the feminist definition of gender, a negative definition that really means gender stereotypes. Where I grew up (the Midwest), gender referred to one's genitalia. Using that definition, the absurdity of the gender fluidity concept is immediately apparent. You "feel" as though you've become another gender, and so you are, and you've somehow divorced your genitals. Then later on, you "flow" back into your original gender and achieve rapprochement with your penis or vagina. How stupid can you get? Isn't this the same magical thinking that underlies Trans identity? And let's not even mention so-called sexual fluidity (although I just did).