I don’t consider heterosexual relations to be comparable to homoeroticism. The first is an action, the second is a state. I think there is a big difference between the two—it’s like comparing killing somebody with being intensely angry with somebody.
One deals with motive, the other the manner. While motive factors into the morality of some acts (like killing), the Bible forbids the heterosexual relations outside of marriage, regardless of motive, or the state that it flows from, and forbids incests in any case, as it does for homoeroticism. Such things are wrong regardless of motive or inner “orientation”, and cannot be does not justified by such, whereas things like Biblical religious rituals, or prayer, or sex in a marriage are wrong if the motive is.