Black-Bellied Scum Prince

A bucket of goat's milk caused the five-year-old princess to nod her head and marry the number one Battle-King of the Xuan Kingdom. When he came to propose marriage, the little princess looked at him with her fingers. He asked, "How did you manage to keep your heart as still as water in front of me?" The little princess replied, "Hypnosis grass, sleep well every day." He asked, "Aren't you jealous that I'm surrounded by beauties?" The little princess replied, "You look like a ferocious tiger. I like little sheep." The little princess grew up and welcomed her wedding night. He wanted to marry her. The little princess waved her grass doll and threw it at him. "This princess has given it to you. The seventy-two positions can be changed at any time." The Battle King's face darkened. What did he marry?