From the Telegraph:
Dr Patricia Morgan told the House of Commons that same-sex marriage reinforced the idea that marriage is irrelevant to parenthood.
This was the principle factor, she said, that has caused the collapse in marriage rates between heterosexuals in countries where gay marriage had been introduced - as well as a sharp rise in cohabitation and the numbers of children born out of wedlock.
She said there was no evidence whatsoever to prove the Coalition Government’s assertions that gay marriage would bolster the institution.
She made her claims in a 22-page paper submitted at the Committee Stage of the Marriage (Same Sex Couples) Bill.
It contained a detailed analysis of marriage trends in Sweden, Norway, Denmark, Spain, Belgium, Canada and some U.S. states were gay marriage has been legalised.
“From what we know about demographic trends, it is preposterous to argue that people suddenly somehow embrace marriage and slow or reverse its decline because homosexuals can have it,” Dr Morgan said.
“We can be certain that same sex marriage will do no such thing as encourage stable marriage whether for heterosexuals and/or homosexuals. Marriage in Scandinavia, Spain, Netherlands and elsewhere is in deep decline.”
She continued: “Same sex marriage is both an effect and a cause of the evisceration of marriage - especially the separation between this and parenthood.”
Dr Morgan explained that gay marriage became conceivable only in those countries where marriage was already in crisis because of soaring “out-of-wedlock births and cohabitation rates” and invariably made such problems worse.
“If marriage is only about couple relationships, and is not intrinsically connected to parenthood, why not give the leavings to homosexuals?,” she asked.
“As marriage is redefined to accommodate same-sex couples, this reinforces the irrelevance of marriage to parenthood,” she said.
“Elsewhere, same sex marriage is an instigator for the casualisation of heterosexual unions and separation of marriage and parenthood.”
She added: “Same sex marriage is more a terminus for marriage or ultimate act of dissolution, rather than a force for revival.”