Levin -Couples have a household each, although maintain a close partnership. Levin argues - it can follow cohabitation, when people become financially secure and choose to live in separate homes. uk one in 10 adults are 'living apart together' or 'LATs' that is, in a significant relationship, but not married or cohabiting. It has been suggested that this may reflect a trend towards less formalised relationships and 'families of choice'-postmodernism.