Not only is gender a spectrum, for some people it isn't even constant. Genderfluid people experience gender as something that can change. Some have a measure of control over it: they can (sometimes) choose what gender they are, but for some people it is outside their control. They might wake up male but by noon feel female and the next day have no gender at all. The frequency that genderfluid people change genders can avry from person to person and from time to time. For some it can change on a dime, others spend days or weeks in the same gender.
Genderfluid people can experience gender dysphoria (the feeling that your body doesn't match who you are) in multiple directions depending on what gender they are at a particular time.
