If I had to guess, this could be related to our internal feedback loops mechanisms. Many emotions create peculiar sensations in our guts - that is an experience

If I had to guess, this could be related to our internal feedback loops mechanisms. Many emotions create peculiar sensations in our guts - that is an experience we all have - and those sensations are nothing else than signals to the brain. It isn't a stretch of the imagination to think that the status of our guts could amplify or dampen the sensations, and thus the feedback to our brain of our emotions, especially the feedback to our conscious mind: If I remember correctly from my studies in psychology, we actually feel our own emotions mostly as physical reactions.