抽烟伤肺爱情伤心
[chōu yān shāng fèi ài qíng shāng xīn]
An analogy between how smoking hurts your lungs and how love can hurt your heart. This suggests a perspective comparing unhealthy, possibly detrimental effects of both habits on health, whether physical or emotional. Implies love causing sadness, akin to harm done by tobacco.