He's not posting adult content, besides, that rule has become pretty irrelevant a while ago, there are threads filled head to toe with furry research.
He's just being a creep.
Is this ignoring the entire chunk of the OP that describes loveual acts in detail?
There are threads where people post what stuff they might be into. They don't write researchographic stories, or post images of loveual acts.
If they're doing it in those threads, then atleast keep it in those threads.
The rules are here for a reason. People are banned for breaking rule 2 all the time.