Home bird British informal noun
Used to refer to someone who prefers spending most of their time at home
Ben is a home bird. He usually declines all invitations to hang out on weekends.
He had always been a home bird, until he met Jane, who is a social butterfly.
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.