Final answer:
The phrase 'the mere commingling of passionate breath' can be interpreted as a metaphor for romantic interaction.
Step-by-step explanation:
The phrase 'the mere commingling of passionate breath' can be interpreted as a metaphor for romantic interaction. It represents the intimate connection between individuals and the exchange of breath that occurs during moments of closeness and affection. This figurative language helps convey the intensity and depth of romantic relationships.