Eating Too Fast 
1. The object on the wall and to the right initially looks like the top of an air conditioning duct. But later you can clearly see it’s a photograph of a woman, tacked to the wall. He rubs it with his shoulder late in the film and it comes down.
2. When the film begins there is a half glass of wine left. When he finishes that, he moves on to taking sips from a glass of water. After the halfway mark he also takes a few swallows from a small glass of what appears to be whiskey.
3. Does he cum at the end? I really don’t think he does. There’s a look of resigned boredom on his face.