在回头的狗只能吃骨头
[zài huí tóu de gŏu zhĭ néng chī gú tóu]
The phrase '在回头的狗只能吃骨头', translating loosely as 'a dog turning back only gets bones', might reflect a belief or observation about regret and rewards. In the context of relationships, it can be seen as an unflattering commentary on returning to a situation where the best times are past.