From google: "are demisexuals asexual? Yes. As mentioned before, demisexual people might identify as asexual, graysexual, or allosexual. Sexuality and orientation are fluid. You might find your capacity for sexual attraction shifts over time."

If you're asexual, aka you don't want to have sex with anyboy, ever, how the hell are you also demisexual, and want intimacy before sex??

We need to stop looking for logic where there is none (note to self, above all, because your question makes perfect sense to me).

These "orientations" are not orientations at all; they're quests for an invented special status.