I need LGBT help. What's the difference between Androgyne, Bigender and Epicene?

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SammyLiimex posted...
Some of these seem made up, or they're super duper niche. I'm gay and never heard of most of those

Yeah I can't be bothered to learn this shit. I'll just leave it at if someone tells me they are that this or the other Allright cool ill try to remember

Question though is bigender like gender fluid at all?
I put my heart and soul into my work and I fear I have lost my mind in the process