Rule 34 Dev - alien balls big_balls big_penis bistup bodily_fluids clothed clothing digital_media_(artwork) erection genital_fluids genitals glans half-life hi_res humanoid_genitalia humanoid_penis looking_at_viewer male male_focus male_only nipples not_furry penis precum red_eyes simple_background solo solo_male undressing valve vortigaunt|12736950304