Rule 34 Dev - 1:1 2011 4_toes abs animal_genitalia animal_penis anthro athletic balls biceps big_muscles big_penis black_nose blue_eyes brown_fur canine canine_penis chains claws cum cum_on_penis cum_string cumshot erection fangs foursome fur grey_fur group group_sex hi_res hindpaw humanoid_penis kneeling knot leaking male mammal markings masturbation muscular muscular_male nude orgasm paws pecs penile_masturbation penis rrowdybeast sex shackles sheath standing stripes toe_claws toes vein vverevvolf were werewolf whiskers wolf yaoi|2229749040