Well, it did take them awhile to appear, and as per the description they are shy. Perhaps they are extremely self-conscious of hygiene by nature, which may include wondering about what microbes exist and how it is best to avoid getting them on their tail, or hands, or face...
Maybe this is the real reason they are so shy. The world is much too dirty.
Maybe this is the real reason they are so shy. The world is much too dirty.