I recently read that partners who are close to one another usually when touching have their heart beats and breathing in sync. Why does this occur? What is the benefit of it occurring? How does this occur?
The study linked below states that this phenomenon may reduce pain. Is it possible that is the evolutionary advantage? How is it that 2 peoples bodies sync their heart rates without knowing the other persons heart rate or being able to see the other persons heart beat?
Goldstein, Pavel, Irit Weissman-Fogel, and Simone G. Shamay-Tsoory. "The role of touch in regulating inter-partner physiological coupling during empathy for pain." Scientific reports 7.1 (2017): 1-12. APA