Yes when I heard this tale the bear got the rabbit to confirm that shit really did stick to the rabbits fur far worse than it did his before scrubbing his arse with the lagomorph.But surely if the shit doesn't stick to the rabbit's fur, it's a pointless thing to wipe your arse with - as it will just smear it around?
There are 29 species of rabbit though so I expect a fair range of absorbency.