The man in the room...

Here’s the opening chapter of a story...

A man wakes up alone in a room in a doss house in Liverpool. He has no idea who he is and how he got there. He’s completely naked and his whole body has been coated in a mixture of milk chocolate and sultanas. The coating is approximately 2 inches thick. On his head he wears a German Picklehaube, circa 1914. It has an old bullet hole in it. On his chest, embedded in the chocolate, he finds a Second Class Iron Cross with the name, Sgt Ernst Arschlekker, 296th Bavarian artillery regiment. Next to the man is a stuffed alligator made to look like a clown. The room is empty apart from four other objects. There’s a novelty art deco style musical bedpan. The bedpan is good quality porcelain and the marks underneath indicate that it was made in 1927 in Stoke-on-Trent by Claris Cliff. If genuine it’s a one off. Inside the bedpan there’s a red rose and an unused condom. There’s also a train ticket from Harwich, an empty jar of honey and a photograph of an anthill.

Can you explain who the man is and how he got there?