I never used emojis in my private life until I started working as a software developer. I end up using them all day, everyday on Slack at work and now they have bled into my vocabulary everywhere.
What's funny about that particular emoji, is that the hearts are actually different, separate emoji. While many others, like the U+1F9D1 PERSON emoji, can be combined with skin tones.
I'm not quite certain why there isn't a simple HEART emoji, modified with a color but it's probably historical.
[1] https://emojipedia.org/search/?q=heart [2] https://emojipedia.org/eye-in-speech-bubble/