Adult relationship struggle often looks modern while operating from ancient training. Long before romance, dating language, boundaries, standards, or conscious partner choice, the nervous system had already begun studying closeness through the primary caregiver, often the mother or maternal figure. The infant does not ask abstract questions about love. The infant asks body questions: When I signal, who comes? When I need, what happens? Does closeness settle me, confuse me, overwhelm me, delay relief, or train me to brace? Those early exchanges do not remain trapped in childhood. They become pattern, expectation, tolerance, attraction, fear, and the private emotional mathematics that later enters adult intimacy calling itself chemistry, standards, taste, or intuition.