My husband sometimes meets celebrities, but really the only one who has excited him is Jeni, owner of Jeni's Ice Cream. Certain stories from this encounter have become a kind of Biblical text in my house. Each time I hear one of the stories, I act like I'm hearing it for the first time. This teenager was working at the counter, and he said, "If you come back tomorrow, be sure to note that we close at 8...." And Jeni gave him a deadpan look and said, "Who do you think *I* am?" Also: Jeni invented salted caramel. Before her, it truly did not exist. (I have some doubts about that factoid, but I keep quiet.) Also: Jeni is a close friend of Joe Biden's. Of course, one thing we know about Joe is this: The man loves his ice cream..... In my house, there is a partial ban on fruit-flavored ice creams; like the writer Anne Fadiman, I feel there shouldn't even be a hint of anything "healthy" in an ice-cream flavor. The only legitimate options are the...