Right - have now looked at it in Photoshop, and I am sure this photo has been doctored - the pig is sort of floating, not resting on the knees of the seated man, and it is not making any dent in his jacket, and there are disturbed pixels round the upper edge of the pig, which means that an image has been added on and the edges are not quite smooth.
Plus that naked bloke is out of proportion to the seated one, so can't be standing where we are supposed to think he is.
The two people standing drinking look right for the scene.
The seated man has not moved a muscle between the photgraphs, so the are not two different ones (unless he is a waxwok)
Any more "evidence" out there?