It's unhealthy to want to make somebody jealous
Joy is looking to buy new heels, but she's deciding between an expensive one and a budget one.
Joy wants to buy new heels.
Joy buys the budget heels because she thinks the expensive ones would be a waste of money.
Joy buys the expensive heels because she thinks they will impress others.
Joy's friends respect that Joy is being modest with her heels.
Joy's friends become jealous of Joy, and they don't like that she's trying to show off.