Rule 34 Dev - 3_toes 4_fingers anthro ass balls bathtub big_eyes black_pawpads black_penis blush blush_lines bodily_fluids brown_body capybara caviid closed_eyes clothing digital_media_(artwork) duo embarrassed erection excited feet fingers fur genitals glass hi_res hot_tub human humanoid_genitalia humanoid_penis interspecies light male male/male mammal membrane_(anatomy) muscular muscular_anthro muscular_male nature nature_background nude outside pawpads penis perspective rock rodent shy stare sunlight sweat swimming toes tondro underwater uniform vein water|11810091632