I tried to post this on Twitter today but it didn't seem to .. (OnlyFans)

I tried to post this on Twitter today but it didn't seem to go through.. do I have to mark things as nsfw if there's a buttcrack showing??! 😱 the rules always seem so confusing on social media. I mean there's full ass porn on Twitter..  so I'm confused. Do I need to set up a separate nsfw acct?