Intimacy is shadowed by the knowledge that shared commonalities are not truly exclusive

Evidence

Something of this feeling is probably not absent in any relation, however close, because what is common to two is never common to them alone, but is subsumed under a general idea which includes much else besides, many possibilities of commonness. No matter how little these possibilities become real and how often we forget them, here and there, nevertheless, they thrust themselves between us like shadows, like a mist which escapes every word noted, but which must coagulate into a solid bodily form before it can be called jealousy. — Georg Simmel, The Sociology of Georg Simmel, 9639

Categorization

• DEFINE: This quietly defines the mechanism behind jealousy: jealousy forms when the non-exclusive generality of a shared bond coagulates into a bodily form.
• XREF: connects to: Marriage promises a shared refuge but leaves both spouses alone — Simone de Beauvoir, The Second Sex, 1277