Information Gained from Watching Antiques Roadshow

So, I was watching Antiques Roadshow and usually I pick up a few facts from the experts. Sure, I have more interest in the best acne products than antiques, but it's a fun show to watch every once in awhile. Although why every single furniture appraiser feels the need to tell us about dove tail joints for the millionth time I’ll never know. Let me recreate the scene. There is a lady sitting in rapt attention while the camera zooms in on a pitcher and bowl set. The appraiser says and I quote "We call this a pitcher and a bowl". I wonder how long he had to work in an auction house to get that down. Really? How did it ever get that name?