* Literal meaning: In the past, people often wore hats with large, floppy ears. When someone was eager to hear something, they would literally turn their ears to face the speaker. This is where the phrase gets its literal meaning.
* Figurative meaning: Over time, the phrase evolved to become a figurative expression meaning "I am paying close attention to you and eager to hear what you have to say."
While the exact origin of the idiom is difficult to pinpoint, its use in literature and everyday speech dates back centuries. It's a simple, direct, and effective way to signal that you're ready and willing to listen attentively.