What is the origin of the idiom "bedroom eyes" and when to use it?

The idiom "bedroom eyes" is believed to have emerged in the early to mid-20th century. The term draws a connection between the seductive or alluring gaze of someone and the intimate atmosphere of a bedroom. It refers to a specific look or gaze that shows attraction or interest in a romantic or intimate way. It implies that someone is looking at another person with a strong desire or in a way that suggests they are interested in being closer.