Does Lemmy have nsfw nudity communities? If so what are the main ones called so I know what to avoid ?

We are not ChatGPT, you don't need to phrase your question like that.

You’ve asked so many dumb questions that I just have to put you on my block list.

Lewy.world is a instance that only federates with other instances that are only nsfw content (like lemmynsfw.com). So I guess you'll want to avoid checking that out (or use it to learn what to avoid)

Use the search with typical terms like nude, gonewild, wife, whatever floats your boat. If you find a community look in which other communities the users are posting. You will rack up a ton of links in no time.