Bai Ling learned the hard way not to get too close to her pet cheetah-cat, Quiji, a domestic cat and cheetah mix that a boyfriend got her for $30,000 US. “I sleep naked,” Ling explains to People Pets. “She was kissing me, and suddenly, she woke up. She saw my nipple, and oh my God, she went for it! If I wasn’t fast, my nipple is gone. She thought it was a toy or something.”