Love is simultaneous mutual regulation, wherein each person meets the needs of the other, because neither can provide for his own. Such a relationship is not 50-50—it’s 100-100. Each takes perpetual care of the other, and, within concurrent reciprocity, both thrive. For those who attain it, the benefits of deep attachment are powerful—regulated people feel whole, centered, alive. With their physiology stabilized from the proper source, they are resilient to the stresses of daily life, or even to those of extraordinary circumstance.