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1:1 alien alien_humanoid almighty_tallest_purple almighty_tallest_red antennae_(anatomy)anus backsack balls big_penis bodily_fluids butt earless erection feet genitals glans green_balls green_body green_eyes green_penis green_perineum group hi_res huge_penis humanoid humanoid_genitalia humanoid_penis hyper hyper_genitalia hyper_penis invader_zim irken larger_sub long_penis male male/male nickelodeon nude nude_male open_mouth pak penis penis_size_difference perineum purple_eyes purple_glans red_eyes size_difference small_but_hung submissive sweat tally_nihil_(artist)the_almighty_tallest thick_thighs toes tongue tongue_out trio zim_(invader_zim)