Scratch my back and I’ll scratch yours

Meaning: This proverb means that if you help me, I will help you in return. It teaches the idea of mutual assistance, cooperation, and reciprocity — people often support each other when they expect the same in return.

Origin: The phrase comes from everyday English usage, dating back to the 16th century. It was originally used in a literal sense but quickly became a metaphor for mutual favors and cooperation.

Examples:
- He helped me with my homework, so I helped him with his project — scratch my back and I’ll scratch yours.
- In business, partners often work together with the understanding of scratch my back and I’ll scratch yours.

Vietnamese: Có qua có lại mới toại lòng nhau

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