There is a feeling called understand

An action is called, etc

There is a tacit understanding is called cheating

There is a trust called a pet

There is a happy is called crazy

There is a separation is called pain

有种感情叫做懂

有种行动叫做等

有种默契叫做忠

有种信任叫做宠

有种快乐叫做疯

有种分离叫做痛