Li Xianyun was certainly aware of the poppy flower.
This flower could be processed into pills for pain relief, but once ingested, one needed to constantly take them; otherwise, one would go mad and become frantic, unable to quit even if they wished to.
Li Xianyun raised her hand and gently caressed Yelu Yan's slightly stubbled chin, slowly moving down, lightly touching his prominent Adam's apple, and smiled, "What is this, you sound rather unsatisfied, still thinking of escaping?"
With an infatuated smile, Yelu Yan gazed at her. "Even as a ghost beneath the peony flower, I would be amorous. Why would I ever want to leave? I would rather you drain me completely dry before it would please me."
The latter part of his statement was very explicit and full of innuendo.