Asexuality is a sexual orientation. People who are asexual do not experience sexual attraction and won’t experience feelings of sexual arousal or attraction for other people, but they can still be interested in romantic relationships. For asexual people, attraction or wanting to form some sort of relationship—romantic or otherwise—has nothing to do with how attractive a person is, but is more about a desire to get to know a person. Some asexual people have romantic relationships and others don’t. Some asexual people masturbate, engage in sexual behaviors with a partner and feel arousal, though it is not directed at another person. Some asexual people do not masturbate or engage in sexual behaviors with a partner. They may not experience arousal but do not see this as a problem that would need to be fixed. All people who identify as asexual experience their asexuality differently.
A great place to learn more about asexuality is the Asexuality Visibility & Education Network.