FURVERT!

anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro ball_size_difference balls big_balls big_penis biped collar collar_only duo erection fellatio genitals greyscale hand_on_head hewge hi_res huge_balls huge_penis humanoid_genitalia humanoid_penis hyper hyper_balls hyper_genitalia kneeling kneeling_oral_position male male/male male_anthro male_penetrated male_penetrating male_penetrating_male mammal monochrome murid murine muscular muscular_anthro muscular_male nude nude_anthro nude_male oral oral_penetration penetration penile penis penis_in_mouth plantigrade rat reito_(hewge)rodent sex smile standing