@KC, nope, i'm calling most Catholic priests celibate - not all of them of course, some have sex with their house keepers (in at least one case in ireland)
@Jamie - gender identity being how you identify; male and female being the most common, genderqueer, agender and gender fluid being the various diverse ways people self-identify.
Gender expression is how you express that identity. So a woman in an Islamic country might wear a hijab and no makeup, while a woman in California might wear makeup and a bikini top, or a woman in London might wear high heels and whatever else - obviously this varies by culture, and individual person.
The comparison is with Catholic Priests who (whether hetrosexual or otherwise) do not express their sexuality because they are sworn to celibacy. Being celibate doesn't change your sexual orientation. It does however change your sexual expression (to not expressing it)
A third gender 'thing' is gender roles - these are stereotypical gender expressions within a given culture; so if girls are expected to have long hair, or learn to cook, and be a good house wife, then these are expectations setup by society to control? I don't know... But gender roles clearly exist.
It may make you uncomfortable if someone you think of as female comes up to you and breaks the stereotype you expect her to fill, perhaps aggressively demanding something. Or likewise if a man asks you for a shoulder to cry on.
Reverse those two situaoons and you are likely much more comfortable with them ( though here i am making huge assumptions about your culture, and i have't even asked where you are from)
What does it mean to be a man?
Well have you ever woken up and asked yourself are you a woman (i'm assuming you are male and not trans) How do you know you're not a man? Without refering to your body? Could you be a woman trapped in a man's body?? How do you know?
I am cisgendered (ie not transgendered) and male, and i can't imagine not thinking of myself as male, i am also fortunate to have been assigned male at birth (that 'its a boy!' moment) Had my penis been smaller and not fully detached, with the urethra not where it is, the doctors might have been confused... Many Intersex people exist, and are usually assigned either male or female (as their sex, not their gender) and forever thought of as a boy or girl by their parents. But that assignment is a best guess based only on external genitalia.
Not on hormonal balance ( which can vary on a spectrum between 'typical' male and 'typical' female ) not on internal genitalia or gonads ( some women have internal testicles instead of ovaries, are XY genetically, but don't respond to testosterone so develop as 'normal' women ) not on chromosones (usually XX for women and XY for men, but we also have XXX, or XXY, and a few XXYY people... ) and definitely not on their self-identified gender ( which anecdotally expresses itself by the age of four, if not earlier, but some people aren't sure as adults )
What is genderfluid? Maybe it is a resuly of hormonal fluctuations, maybe it is a genetic cause, i don't know, but some people say they feel more male obe day or hour and more female the next. Not at all something i've experienced, infact i don't know what it would feel like to feel female...
Note: femme and butch are terms used for people (often women) who express themselves in a stereotypical femine/masculine way. Similar terms exist for men, though they escape me.
This, i think, has more to do with expression than identity.
A girl can be a tomboy growing up, and not be transgender. She'd be a masculine girl. Expressing interest in typical masculine activities while self-identifying as a girl (but perhaps thinking girl-ish things like dolls and houses are stupid)
Of course she might also be a he, that is a trans boy, who doesn't have the vocab to really understand what being trans is.