Nursery Rhyme about Lineage

Hey Daddy, if I'm not allowed to sing this because it's rude then why did you start laughing as soon as the lady left the tent?

Sharp horns, gold eyes, stop your ears against their lies Knife ears, stag's horn, rue the day that they were born Scaled skin, fangs white, never meant to see the light Gilled neck, webbed toes, best kept where the pondweed grows Beast's eyes, pale skin, bar the door lest they come in Bark skin, green vine, cursed until the end of time