Rule 34 Dev - alternate_species alternate_universe animal_genitalia animal_penis ankle_tuft anthro anus ass backsack balls big_penis black_hair cadaverrdog dragoslav_berezovsky ear_piercing ear_ring ears_back equid equine equine_penis erection fur genitals grey_body grey_fur hair half-closed_eyes hi_res hooves horse horseshoe huge_cock kneeling leg_tuft long_hair looking_at_viewer looking_back male mammal masturbation muscle_tone musclegut muscular muscular_anthro muscular_male narrowed_eyes nude pecs penile penile_masturbation penis perineum piercing pivoted_ears presenting presenting_anus presenting_balls presenting_hindquarters raised_tail red_background simple_background solo solo_male tuft vampire vein veiny_penis|6848471064