When they do feel things, how do they switch their emotions on and off? [Avalon knows how to fake emotions, when they care enough to do so, but has never tried to make themself feel anything.]

Yes, that seems to be the case. [They had decided to have sex with Rawne to understand the physicality of it, but had not seen him as attractive.] My body’s reactions are sporadic, but they are only physical. I have never been attracted to someone.