Sexuality in general is best seen as a spectrum, and that even applies to asexuality. I've met folks who only find sexual attraction in people they are intimately familiar with (can't whack the nasty with any random people, they gotta trust and be comfortable and familiar with a partner). Others have a complete lack of sexual interest and arousal. I, myself, do have an active libido, but no actual interest in sex itself thanks to bad events in my past.