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i would say that if you fantasize about both you are probably attracted to both, i don't think not having a crush has anything to do with it. probably, it's just because you haven't met people worthy of having a crush on!
and side note, this is my personal opinion but i think labels are not super important, you like who you like and that's that! no need to put oneself in a box
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intersex ppl have 2 sexes because of their genitalia or reproductive organs, not necessarily 2 genders. most choose to identify as one or the other. so i would say you’re probably sexually attracted to having both genitalia (futacon??), but i think bisexuals are attracted to both genders not necessarily bigender people
I fantisize about being with both genders but i never have a real life crush. I just imagine myself with the perfect guy/girl. But i never have crushes with people i know.