Twitch Updated their Sexual Content Policy:
- Changes: Certain content now allowed with labels
- Artistic Nudity: Permitted under Sexual Themes Label
- Game Nudity: Contextual; labels necessary
- Body Painting: Acceptable with appropriate label
- Mature Games: Label generally covers content
- Stream Visibility: Impacted by content labels
Twerking, grinding and pole dancing are now allowed without a label.
Then it sounds like your actual problem is with a certain pattern of behavior rather than nudity/sexuality itself. So maybe you address your actual concern rather than something tangentially related.