you scratch my back and I will scratch yours

US /ju: ˌskrætʃ maɪ ˈbæk ænd aɪ wɪl ˌskrætʃ ˈjɔːrz/
"you scratch my back and I will scratch yours" picture
1.

네가 내 등을 긁어주면 내가 네 등을 긁어줄게