An English Roman Catholic bishop is claiming that same gender marriage is the unavoidable consequence of the contraceptive pill. I expect his logic is that contraception leads to casual sex which leads to a general acceptance of what once thought immoral which leads to an anything goes attitude which leads to same gender marriage.
But he is wrong because same gender marriage is anything but anything goes. Same gender marriage is a conservative, not progressive phenomenon. It is an attempt to return marriage to a real or imagined time when people got married because they were in love and where all other reasons were secondary or accidental. It is about security and till death do us part and being allowed to be there at the death.
Same gender marriage is the opposite of where "the permissive society" has taken human mating. If anything, contraception has led to the death of marriage for all except the hardcore romantic. Babies out of marriage, babies without a father (often the deliberate choice of the mother), babies for social housing and babies for something to do are increasingly the norm.
It is the irony of the Roman Catholic position on same gender marriage that they are attacking the very people who want to save marriage both for themselves and others. The allowance of real marriage for LGBT couples with all the trimmings (including most of all a church wedding) will lead to more heterosexual couples marrying not less.