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3_fingers 3_toes aged_up alien alien_genitalia alien_humanoid anal anal_penetration antennae_(anatomy)blush bodily_fluids claws clothing dib_membrane drooling duo feet femboy finger_claws fingers footwear footwear_only genitals hair hi_res hind_toe human humanoid interspecies invader_zim irken legwear legwear_only male male/male mammal monochrome mostly_nude mutual_anal mutual_anal_penetration mutual_penetration mutual_penile mutual_penile_penetration mutual_penis_in_ass nickelodeon not_furry ouroboros_position pak penetration penile penile_penetration penis penis_in_ass saliva socks socks_only sxckbug thigh_highs thigh_highs_only thigh_socks toe_claws toes zim_(invader_zim)