answer:Well, for one thing, I don’t think one’s sexual identity/orientation is entirely one (genetics) or the other (socialization). It’s a combination of the two, the proportions of which are controversial and highly politicized. Even if we say, for the sake of argument, that both occurrences you mention are 100% genetics (born this way), the legal/moral difference is that one occurs between consenting adults and the other does not.