FURVERT!

2018 alternate_version_at_source anchee animal_genitalia animal_penis anus ass_up balls black_nose butt canid canine canine_genitalia canine_penis canis claws countershade_tail countershading digital_media_(artwork)digitigrade erection fallenwolf feral full-length_portrait fur genitals grey_balls grey_body grey_fur knot knotted_penis looking_at_viewer looking_back male mammal multicolored_body multicolored_fur nude penis portrait presenting presenting_anus presenting_balls presenting_hindquarters presenting_penis quadruped rear_view red_penis simple_background solo tail tail_anus toe_claws two_tone_body two_tone_fur vein veiny_penis white_balls wolf