I think I am one of these.
"Demiboy" is a term that is kind of dependent on the one who uses it, though it's not as flexible as pan or bi. From what I've seen, it's a sort of fusion dance between being enby and just being a man. It can be used by those who are genderfluid and vary between using they/them pronouns and he/him, but I don't know if that really applies to me.
The best way I've heard it described is when you're not a girl, you're not an enby, but you're just not quite a guy either. When you're in between enby and man.
I've never really cared about what people call me (unless it's derogatory), and especially what they think of me. If you see me as a dude, that's cool. If you thought I was a woman, rock on, man!
I will admit, a certain part of me would like to go by she/her.
Another, stronger, part, wants they/them.
A part stronger than the former but a bit weaker
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