Hmmmmm? He/she thinks I'm insane. But we know it is not I who am insane, but he/she who is mad. Hmmmm? But he/she thinks I'm insane. How to best get him/her to do what I want him to do?..... Maybe live up to his/her expectations of me?..........Yes! That's it. If I act mad, which is what he/she expects, then he'll/she'll be more inclined to do what's asked of him/her.............Hold on. If I act insane he/she may see that as "normal" since it is he/she who is insane.........Got it! I'll act normal and he/she will see that as insane..............Okay, I'll act......something. Yes act.
Point being maybe Sheo is acting in a manner that he thinks you expect of him because maybe, like many who have mental problems, he sees himself as the sane one. And many who are so called "normal" expect insane people to act a certain way so Sheo is just trying to live up to his own mythology as opposed to his reality.