I don't see how many people can say this.
A man can be feminine and still call himself a man and a woman can be masculine and still call herself a woman.
Gender is the mental identity of male and female
Sex is the physical identify of male and female
Fortunately for people like me who were born with gender and sex not matching these days its possible to change your physically assigned identity as male or female to match your mentally assigned identity.
Why do people say that sex is male and female and gender is masculine and feminine?
what's the question ? you already know the answer and has your own conclusion
why do you care so much for what they say ? let them say what they say and be who ever you want to be
as long as you're happy, nothing else would really matter
Why do people say that sex is male and female and gender is masculine and feminine?
nobody knows :/ its all a matter of opinion
Because that is how it is. You may indeed identify with the gender that doesn't match your sex but that doesn't change your biology.
Do they?
I have never heard that before.
I wouldn't worry about it anyway!
gender and sex mean exactly the same thing. your physical sexual organs determine it.