Tumblr blogger Charmingly Antiquated did just that with some of your favorite mythical creatures. Specifically they rearranged a centaur, harpie, mermaid and naga by switching out the human part to the other end.
Seeing as how these creatures had human heads to begin with that means now they’ve got the bottoms of people. What you are about to see is an abomination of an abomination of nature.
Hit the jump for the rest.
Content Warning: Animated boobs.