The reference is remarkably unclear
The first important issue which arises in the passage centers upon whether verse 26 addresses homosexuality among women. The Greed word (meh-teel-lax-ahn) only specifies that the women to whom Paul refers "changed" their practices. It does not specify what the new practices were, nor whether they were heterosexual or homosexual. The reason for believing that the practices were homosexual come from the first word in verse 27. In Greek, the word (oh-mee-os), translated "likewise," has the effect of an equals sign. Since the practices to which Paul refers in verse 27 are, indeed, homosexual, the word indicates that the practices in verse 26 were also homosexual Verse 26, then, is the only reference in the Bible to homosexuality among women. In characterizing these homosexual practices, Paul uses the Greek term, paraphysin translated "against nature." This phrase must not be confused with the same phrase as used in traditional theology in condemnation of homosexuality.
The Greek words physin and paraphysin have been translated to mean natural and unnatural respectively. Contrary to popular belief, the word paraphysin does not mean "to go against the laws of nature", but rather engage in action(s) which is uncharacteristic for that person. An example of the word paraphysin is used in Romans 11:24, where God acts in an uncharacteristic (paraphysin) way to accept the Gentiles. Thus the passages correctly reads that it would be unnatural for heterosexuals to live as homosexuals, and for homosexuals to live as heterosexuals.
Some interpreters approaching this passage, then, have explained that since Paul was talking about people who leave heterosexual practices which are natural to them for homosexual practices which are not, people for whom homosexuality is already a basic life patter are not leaving heterosexual practice and are not included in this condemnation. There is ample evidence to support the fact that homosexual activity, like heterosexual activity, is of inherently neutral ethical value. Sexuality may be used my an individual to either good or evil purpose. Homosexual activity occurs quite as "naturally" as heterosexual activity in a context of caring and loving relationship. Both are equally subject to biblical values and guidelines. Some homosexual activity undoubtedly falls into that lustful and idolatrous characterization which Paul makes in these verses. So would some heterosexual behavior