if a particularly handsome man or woman walked by me on the street, I would probably think something like ‘wow, that person is very handsome and I would be very happy if this person agreed to have sex with me’. This is because I’m bisexual and I’m experiencing sexual desire for this random stranger. I don’t ACT on this sexual desire because I prefer not to have sex with people outside relationships. This does not erase the fact that I did, indeed, experience sexual desire for this random stranger.

If a person who identifies as demisexual was in the same situation, they would probably think something like 'wow, that person is very handsome!’ That’s it. No impromptu daydreams, no awkward boners, no suspicious wetness, no sexual desire. The random stranger is just that - a handsome stranger. This is because a person who is demisexual generally can not experience sexual desire for someone without an intimate emotional connection first. So, no, they don’t “make up most of the population”