Ummm, maybe for just a little bit of humor in what is otherwise an exceedingly difficult job?
I honestly don't think that, if forced to answer the question, "Do you believe these robots 'appreciate' the music you 'play for them'?", they would answer "Yes".
Sheesh, it's like Frank Discussion said, "Lighten up".
I have a difficult time laughing at what I see to be a complete waste of taxpayer dollars. It's like welfare recipients joking about their checks. I don't find it funny.