What is the origin of the idiom "velvet glove" and when to use it?

The idiom "velvet glove" originated from the concept of wearing gloves made of velvet, a soft and smooth fabric. Figuratively, it is used to describe a gentle or polite approach that conceals a firm or assertive attitude or action. The phrase implies the use of tact, subtlety, or diplomacy to handle a situation while maintaining a strong or firm position.