What is dingleberry?

In the context of the discussion I have no idea what you mean by 'relegated'.

I'm not sure if you've ever been near sheep, but simple observation of their droppings should provide a clue as to why humans can't get dingleberries.

Even if you were to find an incredibly hairy person, due to the nature of human faeces what you'd observe is clinker or smear rather than neat berry shaped particles. This would also be compounded by the fact that humans wear clothes and sit down a lot rather than wandering around fields in the open air.

Farmers, depending upon breed, inclination and quality of pasture, will dock the tails of new born lambs which almost eliminates the creation of dingleberries. So I'd suggest that the tail rather than a hairy backside is a crucial element in the formation of quality dingleberries.

Hairy dogs, like those ridiculous looking Hungarian Puli's do get very messy if they are not groomed properly, but I would not call it dingleberries any more than I would call a brick a ball.

The term dingleberry when used to describe a human implies that they are foolish, inept and incompetent.

... and while I agree that bidets seem more hygienic than paper, knowing humans I wouldn't want to go anywhere near someone else's bidet.