[Niamh.]

I suppose it depends on what your understanding of the term sexual orientation is, my understanding of it is which sex you're attracted to, therefore there can only by 4 different sexual orientations - Same sex, Opposite sex, both sexes or neither sex. Anything other than that would fall under personal attractions/who you're attracted to/how you date people but that would still fall under one of those 4 categories....if that makes sense?