Thanks for bringing up some interesting points, Occasionalnamechanger.
I think for a lot of people their orientation is based on what someone looks and feels like.
I don't think that's a 'sexual orientation', I think that's just a preference - I might find myself drawn to nice hair/cute tummy/whatever, but I'm not going to be scanning a group of men to see if any of them meet those criteria, hey he has nice hair and a cute tummy [sorry, I'm having difficulty with that concept!] he'll do, I'll go over and see if he has any plans for the night..
My sexual orientation is lesbian, so I am attracted to women, not to people with nice hair etc. And the attraction is not just sexual, there's another element, difficult to pin down, but it's something based on shared identity, as women and as lesbians.
Obvs that only kicks in if it's more than a brief encounter, nice hair and cute er...tummy? will do grand in the very short term; but only if they belong to a woman, the biological kind. Because that's my sexual orientation, within which I may - or may not, don't want to rule anyone in or anyone out
- have certain preferences.
Does that make sense??