What we mean by gender is fluid or flexible?

Answer 1

One of the problems of gender is that is has always been held to be binary - a person is either born male or female, and therefore will grow up to be either a man or a woman. However, a person who is gender fluid/flexible may not necessarily fit into that definition - while the traditional roles are mutually exclusive (if one is a man, then one cannot possibly be a woman, and vice versa), a gender fluid person may be born with female genitalia, and sometimes feel like a woman, but at other times they may feel like a man, despite their physical appearance. They may feel both simultaneously, or change between feeling female and feeling male. Their gender (not the same as sex) is flexible - it is not restricted to the "normal" gender binary - and may change according to their mood or external environment.