>But until we have more cross-cultural research on lust, it seems
>premature to treat "sexual orientation" as a universal attribute
>of human beings. Maybe the contemporary American system
>of {hetero,homo,bi}sexuality is a borderline, anomalous state.
Or perhaps, as many thoughtful professionals believe, sexuality is normally distributed. I.e., there are, to use Marvin Harris's term, 'obligative' hetero- and homosexuals, but in each case they are a minority at the edges of the overwhelmingly-bisexual (Kinsey 2--4) bell.