I still strongly believe Selena was singing about farting carrots. For all we know she loves eating carrots and her farts really do smell like carrots and she wanted to share it with the world, take away the weight off her shoulder. But the label probably thought it was too "artpop" and covered it up with fake lyrics.
I think it's the same case with Kiiara. "Caught up in my tea" is far more relatable than " Gold up my teeth" anyway.