Learn what "you know they're key to my heart" means, when people say it, and how to use it naturally in English.

This means something or someone is very important and emotionally special to the speaker.
From Never Mess With A Badass Girl, Episode 2
A speaker tells someone they know something is important to their heart.
Use it in affectionate, emotional talk. It sounds poetic and may feel unnatural in very casual English.
Scenes unlock real expressions as you watch
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