rule 34 5 fingers abstract background alphys anal wink animal humanoid anthro anthro on anthro anus ass big anus big butt blue body blue fingernails blue skin blush blush lines bodily fluids breasts buckteeth butt focus dialogue box english text eye patch eyelashes eyewear female femalefemale female anthro fin fingernails fingers fish fish humanoid freckles genitals glasses gnauseating hair hand on butt head spikes hi res humanoid imminent anal imminent rimming interspecies laugh long hair looking at another looking at anus looking at partner looking down lying marine marine humanoid nails narrowed eyes on side onomatopoeia open mouth open smile pink anus pink pussy plump labia ponytail pubes pussy red hair reptile scalie sharp teeth side boob simple background smile sound effects spikes spikes anatomy spread anus spread butt spreading stubble surprise sweat sweatdrop tail teeth text thick tail thick thighs tongue undertale undertale series undyne wide eyed yellow body yellow sclera yellow skin 8922160