He points to the seeming incoherence of their approach to the public finances, in which promises of a tax break for marriage and a higher threshold for inheritance tax jostle with a putatively severe fiscal squeeze.

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Judges could not, and should not, seek to discern the truth about a marriage from the recriminations that followed a break-up.

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He says that when a marriage starts to break down, the unspoken question is: who will seize the child first, the mum or the dad?

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The Birthday Letters was Mr Hughes's first break with a self-imposed silence on his grief over the break-up of his marriage to Sylvia Plath and her suicide.

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Death, job loss, divorce, multiple births and a broken marriage engagement all qualify for the break.

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Mr Duncan Smith said the tax break plan was not a "golden bullet" to preserve marriage, or about "finger-wagging or moralising".

BBC: NEWS | UK | UK Politics | Tories consider family tax reform

Every Breath You Take, written during the break-up of Sting's marriage, is a portrait of a stalker, Stairway To Heaven a confused jumble of Celtic magic and Wordsworth, and My Way, while possessed of a certain elegiac quality, is the most egotistical piece of braggadocio ever pressed onto vinyl.

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In her first broadcast interview about the break-up of her marriage, Ms Pryce, 59, revealed that Mr Huhne told her their marriage was over during the half-time break of a televised World Cup match in June 2010.

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Untraditional couples, where he does most of the housework, may hold a less traditional or more modern view about marriage, whereby marital dissatisfaction more easily leads to marital break-up.

FORBES: Could Sharing Housework Equally Send You To Divorce Court?