Relational disorder – mental disorder attributable to a relationship rather than to any one individual in the relationship. Emotional tyranny – Equal power relationship – Fear of commitment – Friend zone – Internet relationship – Quality time – Reciprocal liking – Respect – Sexual capital – Term of endearment – Roommate – Interpersonal attraction – Broken heart – Long-distance relationship – Marriage – a socially binding commitment to a partner Female-led relationship – romantic commitment where the woman is the lead and/or principle partner; often referred to as an FLR Sexual infidelity – having a sexual relationship outside of a relationship that includes a commitment to have no other sexual partners Sexual fidelity – not having other sexual partners other than one's committed partner, even temporarily Serial monogamy – having a series of monogamous relationships, one after the other Polyamory – encompasses a wide range of relationships, including those above: polyamorous relationships may include both committed and casual relationships Relationship anarchy – a theory that questions the idea of love as a special, limited feeling that is only real if it is restricted to two people only, at any given moment. Sexual promiscuity – having casual sexual partners at will (compare with chastity) Affection – Casual dating – Kiss – Kissing traditions – Emotional intimacy – Female bonding – Life partner – Limbic regulation – Limbic resonance – Limbic revision – MHC in sexual mate selection –