Is there any such thing as "ethical manipulation" in business? When is it right to manipulate a customer a little bit?

[King Belieal]

In general terms, a business person must not use manipulative tendencies on his or her customers. But I am hearing "ethical manipulation in business". Is it even possible that manipulation is a desirable thing in business? At which point can a business person manipulate his or her customers/clients ?

 

[Min George]

An example of ethical manipulation is trying to make a customer believe that a product is scarce. It makes them to buy more quickly. It is called urgency creation.