Where the traditions land

Population figures are each tradition's own most recent published count. Eligibility is set against the World Christian Database, the standard reference for global denominational data.

Why the disagreement

The traditions here split along how each tradition's authority actually works, not along denominational lines. The five traditions with an explicit position share something structural: each has an authoritative document weighty and specific enough to name this practice directly, whether a catechism (Catholic, Eastern Orthodox, Oriental Orthodox), a current governing handbook (LDS), or an ongoing body of doctrinal literature (Jehovah's Witnesses) — and all five land in the same place, treating it as sin but not among the gravest offenses.

The other seven aren't divided on the question; their authoritative documents simply don't address it. Most were written centuries before anyone expected a confession to itemize private sexual conduct this specifically, and none has since issued a statement that does — Assemblies of God confirmed they've never published one. General sexual-purity language exists in nearly all of them, like the Westminster Larger Catechism's catch-all "acts of uncleanness" or the Baptist Faith and Message's call to oppose "all forms of sexual immorality," but stretching that into a specific ruling on this practice would be this site making the tradition's inference for it, not reporting one it already made.

Solving the disagreement

This one resolves differently than a normal disagreement, because seven of the twelve seats aren't holding an opposing position — they simply haven't issued one. Nothing about argument or evidence changes that; it would take a specific institutional act, a governing body, synod, or council formally taking up the question and publishing a ruling, the same way Assemblies of God has position papers on other topics but has confirmed it's never written one on this. Until that happens, "no official teaching" isn't a gap waiting to be filled by better reasoning; it's a decision those traditions haven't chosen to make, for reasons that have nothing to do with the underlying ethics and everything to do with which questions a given tradition's leadership has judged worth a formal statement. That's a genuinely different kind of unresolved than the fractures on other questions in this format — not two sides working from different premises, but one side that hasn't spoken yet.

Sources

Same standing source per tradition on every post, not hunted per question.

• Catholic — Catechism of the Catholic Church
• Eastern Orthodox — Nicene-Constantinopolitan Creed (binding across all jurisdictions); The Longer Catechism of St. Philaret of Moscow (widely used, not binding on every jurisdiction)
• Oriental Orthodox — Catechism of the Coptic Orthodox Church, Fr. Tadros Y. Malaty (Amazon — no full free text found)
• Anglican — Thirty-Nine Articles of Religion
• Lutheran — Book of Concord
• Reformed/Presbyterian — Westminster Confession of Faith
• Methodist/Wesleyan — Articles of Religion
• Southern Baptist Convention — Baptist Faith & Message 2000
• Pentecostal (Trinitarian) — Assemblies of God Statement of Fundamental Truths
• Seventh-day Adventist — 28 Fundamental Beliefs
• LDS — Book of Mormon and Doctrine and Covenants
• Jehovah's Witnesses — What Does the Bible Really Teach?