FURVERT!

abs anthro areola balls big_penis biped black_body black_fur canid canine canis claws digitigrade erection fangs flexing fur genitals glans hi_res huge_penis humanoid_genitalia humanoid_penis hybrid_genitalia hybrid_penis knot knotted_humanoid_penis knotted_penis male mammal muscular muscular_anthro muscular_male nipples paws pecs penis plna simple_background solo tail teeth vein veiny_penis white_background wolf