Rule 34 Dev - 2016 anal anal_masturbation anal_sex animal_genitalia animal_penis anthro balls canid canine canine_penis canis erection fangs fur genitals glowing glowing_eyes grey_body grey_fur knot male male_only mammal mane masturbation muscular muscular_male pawpads penetration penis ravenouscannibal red_eyes sex_toy solo spread_legs spreading toying_self volkmar wolf|4297789928