Devotion from a slave can come in many ways. It can be shown with worship, adoration, and hearing him say how much he loves his goddess. By pure coincidence it turns out slaves are even more devoted when the lady in question has their balls gripped tightly in their hand. In spite of her typically calm and giggly nature, Dani can actually be very sadistic, and she particularly enjoys squeezing a slaves balls while he professes his adoration to her. It just makes her all warm and fuzzy inside.