A Japanese manufacturer is selling a kit from which you can make a gelatin/pudding dessert that looks like a shaking butt. For real.
The dessert is a tribute to the character of Shin Nohara on the Japanese manga series Crayon Shin-chan. The five-year-old Shin apparently shows his butt occasionally. I could not find any source to explain why a five-year-old would wear a red thong, so the tie-in with the character may be window dressing to make the product look respectable.