it takes two to tango
- (idiomatic) Some things need the active cooperation of two parties; blame is to be laid on both parties in a conflict.
- I can't do it by myself, and neither can you – it takes two to tango.
- He started it! Well, it takes two to tango.
some things need the active cooperation of two parties
- Gregory Y. Titelman, Random House Dictionary of Popular Proverbs and Sayings, 1996, →ISBN, p. 174.