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Anyway, I do get it, you think that gender is something quite static and if someone says that they do not feel the same every day is just silly. However, I do not think there are objective parameters regarding how people have to feel a gender. That would read something like, there is a right and objective way of feeling a man and that seems like there is only one model of "man" or "man feeling" (same for the girls) and you have to "feel like a man" similarly everyday.
Not really, my point is that what you feel doesn't determine what you are. There are objective parameters to determine what you are and what you feel doesn't change what you are. That I feel I am the most handsome in the world, or the smartest in the world, does not make me the most handsome or the smartest in the world. And if it's my mother who feels it doesn't either.
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Yep, but gender is exactly about how someone feels. You have a natural gender (or two) and then you have a psychological gender which is actually determined by internal psychological factors. There is no limit to how people may feel and how fluid that may be.