情欲似火
[qíng yù sì huŏ]
The phrase '情欲似火' combines passion and desire ('情欲') with the image of flames ('似火'), implying intense and consuming emotions, particularly those associated with strong sexual or passionate urges or infatuations. Fire symbolizes both purity and destruction, which can reflect dual aspects of love and lust, burning fervently, purifying yet potentially destructive if unchecked.