Juliet ruminates on that for a bit, watching a jar of blood rotate in the microwave, and then she says:

[I am duly fascinated. But... You know, I might not have thought to ask if it weren't for my induced paranoia about local magic of all things being addictive, but is there any particular risk of pleasant biting being the same way? Because I do wonder a little about that establishment's business model, and if it's nice as all that... and it's not like one could keep upping the dose, so to speak, indefinitely, even with access to a... cooperative supplier.]