The Homer quote to Marge is very interesting. Homer: "You don't appear to be in any kind of physical pain, the only type of pain a man understands".
I'm female, but I am unable to tell the difference between physical and emotional pain. There are times I've gone to a medical doctor to find out, because I really can't figure out if I'm sick or upset! So I started reading about how the brain processes pain and "feels" emotions. Guess what? There is only one circuit for both - emotional pain IS PHYSICAL. How could it be otherwise unless you believe that emotions are supernatural (which I'm sure many social people do; it's a punishment from God, etc.)
On top of that, there are only 3-4 REAL emotions: The flight or fight response (anger, fear); disgust, and pleasure (or a neutral state of no emotion). Children LEARN to call their basic pain responses "emotions" - it's a part of social training. This is especially true for females - a way of keeping us powerless. Society teaches females to imagine that real physical responses are thousands of emotions that don't really exist!
What I'm thinking is that Aspies experience basic physiological pain, not the "emotions" that social children learn. Also that we have a neutral setting, which is our default setting, and it produces that blank reaction when people say something unimportant or baffling. We just don't feel anything unless there is something in the environment that triggers fight or flight or disgust. Social people interpret our neutral setting as offensive; after all, to them, everything they say or do, and the reaction they get from people, is vital to the continuing existence of the universe. They assume that we don't care, because we're not in their frantic (to us) emotional mode 24/7. Emotion for us isn't this fantastical overwhelming supernatural state that colors and controls the fate of mankind: for us it is shades of pain.
I think this also explains why Aspies commonly suffer from anxiety: social situations, from the time we are born, are simply dangerous for us. I mean, if you whack a dog on the nose every time it gets up on the couch, and then force it to get up on the couch and whack it again and repeat this cycle again and again, will that dog not soon be in a state of perpetual fear?