I don't mean on a personal level to "want", I mean you as a whole including your body, mind, muscles etc. Say for moving in your sleep, your mind might not want to but your body says otherwise. One part of you still 'wants' to.
Even allergic reactions are something your body wants, specifically your immune system since it thinks it's a danger when it's not. "Better to be safe than sorry."

Also, TL; DR! We've been through this