They are pretty icky. But the reason is that humans make laws about how humans may be depicted (at least in, say, the UK/Canada/Australia/etc.), while they don't care about depictions of animals.
As a site specifically for furry art, we're not that interested in spending a lot of time on figuring out exactly which humans may be depicted in which circumstances, so we just don't allow them nude or in porn at all.
Unlike FA, you're welcome to show a cropped preview here and link to the original elsewhere, as long as the preview itself meets our policies (including being made by you or for you).
They are pretty icky. But the reason is that humans make laws about how humans may be depicted (at
