" In practice, I always get you to give me the red M&M’s.”
“That was a device to let you know when you were using enough charm to affect a human,” he snapped. “I got it from a human parenting manual. I didn’t think you were stupid enough to believe you could use your charm against me.”
My eyes flashed. I remembered mother telling me the only way she’d found to potty train me was giving me M&M’s. I was not flattered by the comparison. "

― Kaitlin Bevis , Persephone (Daughters of Zeus, #1)