This is something I don´t really understand. When Mr. Tilney finally manages to get hold of Catherine and starts to dance with her (ch.10), his conversation subsequently turns to the subject of marriage, starting with:"I consider a country–dance as an emblem of marriage. Fidelity and complaisance are the principal duties of both; and those men who do not choose to dance or marry themselves, have no business with the partners or wives of their neighbours.”