Rule 34 Dev - anthro assisted_exposure ball_size_difference balls biceps big_muscles big_penis black_nose blush bodily_fluids brown_body brown_eyes brown_fur claws comparing comparing_penis duo embarrassed erection foreskin front_view fur genitals grey_body grey_fur hand_on_knee hand_on_leg humanoid_genitalia humanoid_penis imminent_sex larger_male looking_away male male/male musclegut muscular muscular_male nipples nude open_mouth pecs penis penis_envy penis_size_difference pink_nose retracted_foreskin sauna sitting size_difference slightly_chubby smaller_male smile steam sweat teeth thick_penis towel towel_pull unwanted_erection vein veiny_penis furryrevolution bear domestic_cat felid feline felis mammal colored hi_res|3052617085