it comes from trans subreddits like r/traa and r/egg_irl, where posts of the "the person reading this is a good girl UwU" variety had CWs because they could cause dysphoria to non-transfems (there was an equivalent "post assumes reader is transmasc" too)

here? tbh, most of the posts with that CW don’t even assume anything about the gender of the reader, it’s just posts about transfems. and i agree with you i don’t super like that "this post is about transfeminine people" is seen as warranting a CW.

I was reading the community rules, got paranoid and started getting very liberal with the content warnings, just in case.
As to why they exist, it's generally bad to assume someone's gender identity. That's what I believe, at least.

its just a warning that post assumes someone's gender identity

the trans (otherwise non-gendered) spaces i've tended to occupy have been trans fem dominated... which is cool but eventually can feel kind of exclusionary to like... share a space? because i'm trans masc and not necessarily looking to get the good girls posts or the girl euphoria posts etc

so it's not really like a... oh being a trans fem is triggering... it's just an acknowledgement that not everyone in the space is. but i get feeling some friction about it. maybe it helps to imagine the equivalent trans masc post? "girlmoder or not, you're all handsome and valid"... and you can decide for yourself if you feel like the "cw: assumes viewer is trans masc" is warranted

but that's what i understand the origin of the rule to be, and for what it's worth, it does make it a lot more pleasant to be around for me

Sorry, can't find the source...

I originally found this meme as an AntiMeme version on Reddit and thought the original was hilarious.

Here's a link:
https://www.reddit.com/r/AntiMemes/comments/1sc9p9b/comment/oebfn0u/?force-legacy-sct=1