rule 34 2023 animal genitalia animal penis anthro anthro on anthro balls biped black balls black penis bodily fluids brown body brown eyes brown fur brown hair digital media artwork duo english text equid equine equine genitalia equine penis erection fur gay genitals green eyes hair hi res intraspecies lizardlars low angle view male malemale male only mammal medial ring multicolored penis muscular muscular anthro muscular male navel orange body orange fur penis pink penis saliva smile text two tone penis vein veiny penis yaoi 7466062