It Takes Two to Tango

Said to emphasize that both people or parties involved in a difficult situation must accept the blame, or that an activity needs two people who are willing to take part for it to happen:

- Yet, as you know, it takes two to tango and two willing parties to achieve an agreement.

- Let us always remember that when it comes to discussions and dialogue with somebody with whom we have had difficulties, it takes two to tango.

Source: Cambridge Dictionary

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