没心没肺不会累一心一意是真爱
[méi xīn méi fèi bù huì lĕi yī xīn yī yì shì zhēn ài]
Admitting lack of empathy or deep feelings yet finding solace in wholehearted devotion, asserting that undivided love represents true dedication ('一心一意') which won't lead to exhaustion or burden due to complexity.