orangeban said:
Forget biology for a second. I realise that makes me sound like a complete idiot, but hold with me.
1)Let's start with the basics. Most people are born as male or female, and most are happy with the sex they are assigned (cis-people).
2)Some people are born male or female, and aren't happy with that sex, and desire to be the other (normal) option (most trans-people).
Now, bisexuality is cool with both of those.
3)However, it's more complicated. Some people aren't born as male or female (think hermaphrodites), instead maybe having aspects of both, or neither.
4)Some people are born male or female, but don't want to be either. Maybe they don't like labelling themselves(I'm cismale, but I see where they are coming from, society has a nasty habit of deciding how people should live based on their sex), perhaps they don't feel they fit either definition. Since them believing this harms no-one else, and doesn't harm themselves (what harms them is society forcing them to conform to a certain gender) we should allow these people to choose their own definitions.
Like bisexuals, pansexuals are cool with 1) and 2), but pansexuals are also cool with 3) and 4). And that is the difference between bisexual and pansexual.
I'm afraid I'm going to get kind of pedantic here, but please bear with me.
3) Even so, most such people tend to visually identifiable as either male or female, you may think "she looks pretty masculine" or "he looks really feminine", but the point is they still tend to end up on one side or the other. Though I am willing to concede that this may just be people's natural tendency to categorise everything.
4) This is an issue of gender, not sex, someone who considers themself a-gendered will still have a male or female body, and this is what sexuality is concerned with, the body. The point you have raised fits more into romantic predisposition; the kind of person you fall in love with. Perhaps the term panromantic bisexual would be more apprpriate.
As far as I'm concerned, if pansexual is to be considered different from bisexual, then the term demisexual must also be considered a separate category, which would give six categories of sexuality; heterosexual, homosexual, bisexual, pansexual, asexual & demisexual.