I get a little fired-up about this stuff because fan communities can be messy, but here's the straight scoop from my experience: Reddit does allow explicit adult content in many places, but you have to follow a few strict boundaries. If an image of Rhea Ripley is clearly of an adult, consensual, and not illegal, it can be posted in subreddits that permit NSFW material — and it absolutely needs the NSFW tag or to be posted in a community already marked for adult content. Subreddit-specific rules matter a ton: some wrestling or fan communities prohibit sexualized images of performers, while others have dedicated threads where NSFW content is fine. Read the sidebar and pinned rules before posting.
What will get content removed or your account punished is posting anything non-consensual (like leaked personal photos or revenge material), sexual content involving someone underage, or images that violate copyright in a way that leads to takedowns. Reddit also has site-wide policies against harassment and exploitation, so if a photo was shared without permission or is obviously doctored to sexualize someone, moderators and admins will act. In short: consent, legality, copyright, and subreddit rules are the filters I check every single time — and I usually err on the side of sharing official promo shots or cosplay instead of questionable explicit images.