>WHAT INDIVIDUAL you are attracted to
>is completely different than WHAT
>SEX you are attracted to.
> If you are attracted
>to your sister/brother, that is
>an issue of circumstances (there
>is no reason, much less
>evidence to believe any differently).
>If you are attracted to
>men/women, that is (at least,
>by many indications) an issue
>of your being.

I'm not sure I understand what you mean by "issue of circumstances" vs. "issue of your being".