Ye no shit theres prejudice. you know why? because if he isnt taught, a kid without any outside influence from both sides will, if you ask "how many genders there are", say boy and girl, because thats written in our gened, coded in our brain, that sex=gender. For that purpose, where i live, some groups have achieved that the idea of gender=social construct and gay=ok are minimally mentioned to children so theres, and i quote, "minimal outside influence on a child, that would make him think something is ok while the child mind would develop diffirent thinking without the influence". i do not necessarily agree with that. The only way that gender is a social construct is exactly one word in the ethical wordbook in elementary, and it is mentioned as a "characteristic of a person" along all other things it also said (translated) "social sex", because the fact that my language has one word for both gender and sex which also doesnt help.