rule 34 2020 4 toes amputee anthro anthro on anthro anus ass balls black body black fur bottomwear canid clothed clothing digital media artwork disability duo feet felid feline fur genitals grey body grey fur hair hi res kai viskasunya male malemale mammal matt viskasunya nude pants pants down partially clothed pawpads prosthetic prosthetic leg prosthetic limb romantic couple simple background tailwag toes viskasunya white background white body white fur 4381331