IMO spiders and private parts full nudity belong behind a CW. A brief description might be helpful for others. Or you can create a CoSo group and invite people to join you.
I post #CoSoEyeCandy every once in a while with a CW and never have I had a single person complain. I don’t think it is any different if I were to post pictures of myself or other widely distributed pictures of others.
No, this isn’t only fans, but that also doesn’t mean you can’t express yourself within the TOS.