FURVERT!

2015 abs anal anal_knotting anal_penetration animal_genitalia animal_penis anthro anthro_penetrating anthro_penetrating_human anthro_penetrating_male anus ball_size_difference balls biceps biped blue_eyes bodily_fluids canid canine canine_genitalia canine_penis canis digital_media_(artwork)duo erection fangs foreskin fur genitals grey_body grey_fur hair human human_on_anthro human_penetrated humanoid_genitalia humanoid_penis internal interspecies knock-kneed knot knotting larger_anthro larger_male male male/male male_anthro male_human male_on_anthro male_on_human male_penetrated male_penetrating male_penetrating_human male_penetrating_male mammal muscular nipples nomozuni nude partially_retracted_foreskin pecs penetration penis pigeon_toed red_eyes redrusker ridiculous_fit sex size_difference smaller_human smaller_male smaller_penetrated sweat teeth tight_fit tongue tongue_out vein veiny_knot veiny_penis wolf