Ace- and aro-coded characters like Dexter and the Bond antagonists are removed from humanness in some fashion—more aligned with blood-thirsty beasts or cold, unfeeling machines—embodying the Villainous Aromantic Asexual trope: Media that features characters with psychopathic [or antisocial] traits often try to play up their inhuman nature as much as possible. Many decide a good way to hammer the point home is to have the character reject all forms of sexuality.
