In both headlines there is something readers may not expect. As a result, disorder is created, which requires investigation to restore sense and meaning.
Curiosity headlines are some of the hardest to write, because simply turning something on its head usually isn’t enough to encourage your reader to take action.
To create a real desire for your reader to click, read, or sign up, you have to violate the right expectations.
Loewenstein discovered that curiosity increased when you highlighted a gap in someone’s knowledge, particularly when it related to a topic that interested them.