Like most inexplicable trends, this one comes from Japan and has spread elsewhere.
Yes, turd cakes. Ranging from piles of poo to the litterbox shown here, the turd cake is becoming quite popular. With cakes becoming increasingly intricate, it's just a matter of time before you see one on Ace of Cakes or TLC's shitty copy, Cake Boss.
As for me, I am not a fan of poo; even if it's in cake form I may feel nauseous. Yes, I clean my cat box, but that's on a must do list and consumption of food that looks like crap is not one of those things I must do before I die.
I have to lie down before I lose my lunch.