Rule 34 Dev - abs anthro balls biceps bigshadowdragon blush casual_nudity detailed_background embarrassed flaccid foreskin genitals grey_body hi_res humanoid_genitalia humanoid_hands humanoid_penis light looking_down male mammal muscular muscular_anthro muscular_male navel nipples nude penis rhinocerotoid rocksteady smile solo solo_focus|7533596504