it takes two to tango

1.
WorldwideUnited Statesidiomaticinformal
- Indicates that a particular action, situation, or task requires the cooperation or active participation of two people.
- Used to stress that an outcome depends on the involvement of both parties rather than one acting alone.
2.
WorldwideUnited Statesidiomaticinformalcolloquial
- Used to suggest that both parties share responsibility or blame for a problem, conflict, or wrongdoing.
- Often employed to deflect sole blame by pointing out mutual culpability or involvement.

Examples: