Used to express a very strong, often inappropriate sexual desire.

Sexual Connotation

Talking about lusting after someone is considered taboo in polite conversation.

Usually Taboo

Implies a preoccupation with the desire that can be overwhelming.

Commonly used to indicate an improper or excessive desire for something.

Highlights a desire that's beyond normal ambition, veering into greed or obsession.

When not about people, it's not a sexual desire but a metaphor for intense longing.