One needs to understand the terminology of the trans community in order to start understanding those who are transgender. I know of a trans couple, he is FTM (female to male) she is MTF (male to female) but both identify as non binary. Very confusing to understand-if they identify as non binary then why choose another sex to transition into? Even using he/she pronouns can be unacceptable to some as they feel that gender neutral pronouns ought to be used. People can identify as agender, asexual, all gender, non gendered, pan gendered, poly gendered, gender neutral, gender fluid and that's just for starters. I don't profess to understand all these but it's a far wider community than first thought.