Chinese medicine embraces the idea that an organ can be treated with a medicine of similar shape, and this has led to animal reproductive organs such as tiger penises, seal penises and snake penises being valued by the Chinese as tonics.
中醫講「以形補形」，於是虎鞭、海狗鞭、蛇鞭…… 等等動物的生殖器官都成了中國人眼中的珍貴補品。