APAD: You Scratch My Back and I'll Scratch Yours

来源: 于 2023-08-05 11:26:47 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

One of many manifestations of the reciprocity principle. In APAD, we've learned

'one good turn deserves another.' Back-scratching, however, seemed to carry a

negative shade.