You scratch my back and I'll scratch yours
Meaning: Used to tell someone that if they help you, you will help them. You do a favor for me and I'll do a favor for you.; If you do something for me that I cannot do for myself, I will do something for you that you cannot do for yourself.
Example: I'll grab the box on the top shelf if you will creep under the table and pick up my pen.
Example: I'll grab the box on the top shelf if you will creep under the table and pick up my pen.
