" Ivy had once said that sharing blood was a way to show deep affection, loyalty, and friendship. I felt that way about her, but what she wanted from me was so far from what I understood that I was afraid. She wanted to share with me something so complex and intangible that the shallow emotional vocabulary of human and witch didn’t have the words or cultural background to define it. She was waiting for me to figure it out. And I lumped it all with sex because I didn’t understand. "

― Kim Harrison , A Fistful of Charms (The Hollows, #4)