One hand washes the other (and both wash the face) proverb
Used to indicate that helping each other or working together toward the same goal will have advantages for everyone who is involved
The relationship between fashion and film is that one hand washes the other and both wash the face.
If you invest in my company, I will share the profit with you. One hand washes the other!
The more people working together on the same task, the easier it will be.
In close association or collaboration with someone, often to do something dishonest, illegal, or immoral.
Used to indicate joining or being associated with another person or a group.
To talk the main part at once, or avoid talking about what is not important
You should get straight to the point.