մատեան անկապութեան

in couples, and they should not even be ~~turing~~ ‘complete’ couples, there is a collective responsibility, and collective punishment. like in army.

one is able to punish both. or one can be the reason to punish both. or one can force the other to play ‘loose-loose’ game.

plenty of variants, and the most important is, nobody has to teach any of those - all known by heart, intuitively, and it is not necessary to make an effort.