Yesterday’s taboos are today’s norms. Who could have imagined ten years ago how much our culture would come not only to accept but also to celebrate homosexuality and transgenderism? I can’t help but wonder what taboos today will give way in the days ahead. Incest? Bestiality? Indeed, where does this end?

Now that homosexuality and transgenderism are all but normalized, polyamory seems to be the next sad frontier of the sexual revolution. The latest installment of this trend appears in The New York Post’s profile of a polyamorous “throuple.”

Stories about polyamory are appearing with more and more frequency, and I have seen a theme beginning to emerge in other polyamorous profiles that I have read. Not everyone in the relationship is happy about polyamory. At least one partner wishes for monogamy but concedes to polyamory so that he won’t lose the one he wishes he could be monogamous with.

The throuple in the Post’s profile is no different. One man and woman in the relationship describe themselves as “bisexual.” A second man describes himself as “homoflexible”—by which he means homosexual but willing to accept the presence of the woman so that he doesn’t lose his man.

Readers of this blog know where I stand on this one. Any sexual relationship outside of marriage is an immoral one and does not promote God’s glory or human flourishing. I grieve that our culture has become so debased that this kind of blatant immorality could be perceived as normal or wholesome.

Acceptance of polyamory begs some fairly obvious questions about sexual morality that our culture is not prepared to answer. If sexual morality is reduced to consent, then on what basis could anyone possibly object to polyamory? If our culture is willing to accept polyamory merely based on consent, where does this end?

Yesterday’s taboos are today’s norms. Who could have imagined ten years ago how much our culture would come not only to accept but also to celebrate homosexuality and transgenderism? I can’t help but wonder what taboos today will give way in the days ahead. Incest? Bestiality? Indeed, where does this end?

Denny Burk is Associate Professor of New Testament and Dean of Boyce College, the undergraduate arm of the Southern Baptist Theological Seminary. This article first appeared on his blog and is used with permission.