The difference between my ex-wife and non-accepting women I dated before and after was that she had friends where the husband crossdressed, she'd gone out with them to parties (husband and wife were both really attractive) and thought they had a really good relationship. So when I first mentioned that I'd crossdressed for Halloween, then that it was more than one Halloween, then more than just Halloween, she was able to relate. She never expressed any bisexual interest despite many bi and lesbian friends (from tennis) and ample opportunity (because - built).
Had your respondent said, instead, that an accepting SO believes that gender or sexual identity is a continuum rather than binary, that I'd be more likely to agree with.
