Agnosexual is when you know that you are on the asexual spectrum, but either don't know where or there are no labels that suit you.
Person 1:I am Agnosexual.
Person 2:that's just a label made up to make people that are questioning feel special!
Person 1:no it isn't, because I'm not questioning, I know what my sexuality (or lack thereof) is.
Used to be known as autochristosexuality. Many people in the asexual community have found, that a fair amount of individuals that do not experiencesexual attraction to people, experience arousal to sexual activities that they are not involved in.
Karl is aegosexual because even though he experiences sexual arousal from reading things in books or seeing it on tv he has no desire to actually do it.