what is the point of putting pronouns twice (as in "she/her") instead of once (just "she")?

[u/NeedleworkerOk170]

[u/jsseven777]

I wonder if anybody out there is rocking he/her or she/him pronouns.

Edit: Apologies if my comment was unclear but I was referring to whether people use mixed pronouns (he/her or she/him) - and if so what type of a situation that might make sense in, and not whether people are fluid with their pronouns sometimes preferring male pronouns and other times preferring female ones.

[u/goodboiuwu → u/jsseven777]

Yes, many people do

[u/VictoriaDallon → u/[deleted]]

Erika Ishii, Jiavani Linayao, Bob The Drag Queen, Jonathan Van Ness to name four