You can look at some adult newsgroups at this web site.
Turn OFF safe mode in the top right.
Then choose Browse.
Then you can browse "Erotic Images" newsgroups or "Erotic Videos" newsgroups.
Also, if you search in google with the newsgroup name you want it will show you other web sites that display newsgroups.
So go into google and put alt.binaries.erotica,pornstar.80s and you will find other web pages showing newsgroups.
You can also look at newsgroups with a program like Newsbin Pro but you must have the name of your ISPs newsserver, such as news.myisp.com or something like that