rule 34 2019 animal genitalia animal penis anthro anthro on feral black fur black nose blue eyes border collie brown eyes brown fur canid canine canine penis canis collie cuddling domestic ears back eyebrows feral floppy ears fur german shepherd heart kola artist lying male mammal multicolored fur on back open mouth penis precum simple background tongue tongue out two tone fur white background white fur yaoi zoophilia 3167759