backscratching

基本解释

But the favour system is far from altruistic or always positive: unspoken mutual back-scratching is common, note the authors.
但这样的恩惠制度远不是利他的或总是正面的：不说出口的互开方便之门是常见的，作者指出。
They were content with the simple things in life that come free: A beach day, a horsy back ride from Daddy, a story and a back scratching from Mommy, pillow-and-blanket tents in the living room.
一些简单的事情就能让他们心满意足，而这些都是完全免费的：去沙滩玩一天，骑在爸爸的背上玩骑马游戏，听妈妈讲故事并给他们搔背，拿上枕头和毯子在客厅里搭起帐篷“露营”。
They were content with the simple things in life that come free: A beach day, a horsey back ride from daddy, a story and a back scratching from mommy, pillow-and-blanket tents in the living room.
他们对生活中免费而又简单的事情很知足：在海滩上玩一天，爸爸背着回家，妈妈讲讲故事或者挠挠背，在客厅搭“枕头床单”帐篷。

You could say we get involved in cases of exceptional greed versus normal back-scratching.
FORBES: Emerging New Fiduciary Trends and Developments: Systems of Mass Deception vs. Systems of Enhanced Diligence (September 1, 2003)
In China such back-scratching is all part of guanxi, or relationship building.
FORBES: Hollywood's Mr China: Dan Mintz, DMG
The appointment of a people's ombudsman, a constitutional tribunal and an independent judicial council will help to break the tradition of mutual back-scratching between government and judges.
ECONOMIST: Bolivia