In the wedding ceremony, couples vow to marry 'till death us do part': yet last year the British were divorcing at the rate of 2,700 a week. Is the 'Vow' too strong? Or are people today too weak? Peter France gives the results of a national opinion poll, commissioned by Everyman, on present-day attitudes to the wedding vows; meets couples who have experienced the marriage paradox; and suggests a new form of vow that might be more realistic for today.