FURVERT!

1:2 2016 4_toes abs animal_genitalia animal_penis anthro arms_tied balls barefoot bdsm biped black_body black_claws black_fur black_nose bondage bound canid canine canine_genitalia canine_penis canis cave claws collar collar_only digital_media_(artwork)digitigrade erection feet fur genitals grey_balls grey_body grey_fur hands_behind_back hi_res legs_tied looking_at_viewer male mammal multicolored_body multicolored_fur murobo_darkfang muscular muscular_anthro muscular_male navel nipples nude paws pecs penis penis_tip pink_nipples red_eyes restraints rope rope_bondage sheath smile solo spiked_collar spikes submissive submissive_male teeth toes two_tone_body two_tone_fur virtyalfobo wolf