FURVERT!

abs absurd_res animal_genitalia animal_penis anthro balls belly big_balls big_penis black_body blue_eyes canid canine canine_genitalia canine_penis dire_wolf erection fenris_ragnulf fullbodywolf fur genitals hi_res huge_balls knot male mammal markings masturbation muscular muscular_anthro muscular_male nipples nude pecs penis penis_grab prehistoric_species simple_background solo tail tail_markings white_belly