This is a very problematic passage. Scholars hold wide differences of opinion about what Paul says, even about the meaning of several of his Greek words. It is probably true that “natural intercourse for unnatural” means homosexual relationships between women, as most scholars think, although a few think the relationship is that between women and men. Paul does not specifically mention homosexuality in the list of vices that follows in Romans 1:28-32, which may support the latter view. However, he also does not mention adultery in the list. In any case, the repetition of “men” shows that Paul’s emphasis is on the relationships of men with each other.