Looks fake to me.
Why is he moving so gingerly and walking so strange (scared it will fall of, I think, - and I don't mean his dick, I mean the sheath over his dick and balls).
Anyone who has ever dused a willy-clone kit will know that you can paint it with layers of latex and build it up and up and up until you are able to make a new alginate mold from the enlargement and if it includes your balls, easily make a complete sheath that can be held on by clenching the buttocks over the edges.
Horror film prostheticians would find that a piece of cake.
However......Just my opinion. Difficult to prove a negative.