Pain body is a term coined by Eckhart Tolle but the concept is well-known with psychologists and neuroscientists. The memories of our traumas (small and big and often from early childhood, first 1000 days) get stuck in our cells. And that's how we trigger... Fight, flight or freeze. Communication is not about words, mainly non-verbal. Energy, frequency and vibration. So if you trigger on the same traumas, have the same pain body, a sentence like "can you please put the dishes in the dish washer next time" can wreck a marriage if we're not aware... I'm looking forward to read what your perspective is...