Prior to the 1960’s, a consensus existed that the primary purpose of marriage was the procreation and rearing of children, with the mutual fulfillment of the partners being a secondary purpose. Then came The Pill, which effectively separated sex from procreation. The fulfillment of the partners gradually came to be seen as the primary purpose of marriage, with children coming in second and couples possessing an option to remain childless. Over time, the fulfillment of the partners, with or without marriage, became a raison d’etre and personal sexual fulfillment turned into the Holy Grail. In this context, the “rationale” for gay marriage was made to look plausible.
Maybe we need to check our premises.