Ouch! I bet you got a funny look from that one. Well, it has to do with naval lingo. A boat can fit on a ship but a ship can never fit on a boat. Although there is no magical line where a boat becomes a ship, generally speaking a boat is a small, special purpose vessel with a single deck. A ship is a large ocean-going vessel with multiple decks. You just committed the naval equivalent of laughing at his tiny….er…umm…feet. Yeah, that’s it.