Rule 34 Dev - all_fours anal anal_penetration animal_genitalia animal_penis anthro anthro_on_anthro ass_up balls canine_genitalia canine_penis erection fellatio foursome from_behind_position genitals group group_sex knot larger_male licking male male/male male_penetrated male_penetrating male_penetrating_male nude oral oral_while_penetrated penetration penile penis penis_lick raised_tail sex simple_background size_difference smaller_male tail tongue tongue_out train_position white_background rukis springer bird_dog canid canine canis domestic_dog herding_dog hunting_dog mammal mastiff molosser pastoral_dog spaniel weimaraner welsh_corgi 2010 monochrome|361787440