rule 34 2022 ambiguous form ambiguous gender anthro artist name balls beard birdpaw artist bodily fluids brown beard brown body brown fur brown hair brown penis brown stripes brown tail chin tuft digital media artwork duo facial hair facial tuft fangs felid feline foreskin fur genital fluids genitals glans goatee grey body grey fur guide lines hair half closed eyes hi res humanoid genitalia humanoid penis machairodontine macro male mammal micro multicolored body multicolored fur narrowed eyes penis pink tongue precum sharp teeth side view simple background smile striped body striped fur stripes tail tuft tan background tan body tan fur teeth tongue tongue around ankle tongue around penis tuft white body white fur yellow sclera 6906378