As riveting as the sight of me eating batteries was! [He emphasizes rivet just a little bit, as he settles in for a while keeping an eye out for surreptitious vomiting or casual toothpick use as sleight of hand to pull it out between teeth, or something. Besides, it's not like the boredom of the sight stopped Sans from getting all fluffed wings and agitated the moment Papyrus ate a battery upside down, anyway.]

...It's not like I have a recipe for ghost burgers, anyway. Anything else is a letdown after that. [He is absolutely not confessing to having secretly tried one somewhere, out of an idle curiosity.]