Pronouns may seem to be inherently known by most based on traditional gender roles, however we have trans and non-binary siblings to take care of too! Whether someone prefers he, she, they, or others, just ask! It's free.
At the root of social contructionism is language, how you speak matters! Commonly using allusions to gender in reference to actions, ideas, and even arbitrary things like colors lead people to believe that males cannot be feminine and and females cannot be masculine. By placing weight on these categories, femininity was a word of weakness, masculinity that of strength dividing things into "for boys" or "for girls." But not all not all females are women and not all males are men, gender is typically assigned at birth, that doesn't make it true or permanent.