Consenting adults should be free. Consenting adults with inanimate objects should be free too, but maybe get therapists if it becomes a social problem (ie. always humping mud or apple pies or sniffing shoes in public).

There's no shortage of photos animals humping/raping other species. I'd say consenting species..., but that's a grey line I don't even want to come close to with a thousand foot pole. I wouldn't care so much about the snarl if I suspected there were fewer beastie people than trans people, ie. extremely rare and fringe - but I couldn't say or even guess if this is true. People in general too often let me down.

Crossing that big grey line to other things, like kids, is IMO way over the line.

I understand how some might find all fetishes a big ugly mess, but they are not all automatically related and there are distinctions. Gay men may be different but may not be into boys, or animals, or being fem - though a minority may be. And there's a huge difference between being curious a few times and being "gay" as a lifelong identity.