I was actually surprised to read that some people thought the bathroom scenes were unnecessary. I beg to disagree.
There are a few levels to those scenes.
It implies that the Macho Iberico and la Santa Zorra also knew each other. It was not simply sex between strangers. Who knows, maybe Fernando had something to do with Nieves not returning Carlos calls. It is also a good contrast when he says that the bathroom is the only place where they can be themselves. Of course, that was before we learn that cameras are everywhere.
It is also the key to the game played between Nieves and Carlos during the ball game.
So, it was not irrelevant at all.
There are a few levels to those scenes.
It implies that the Macho Iberico and la Santa Zorra also knew each other. It was not simply sex between strangers. Who knows, maybe Fernando had something to do with Nieves not returning Carlos calls. It is also a good contrast when he says that the bathroom is the only place where they can be themselves. Of course, that was before we learn that cameras are everywhere.
It is also the key to the game played between Nieves and Carlos during the ball game.
So, it was not irrelevant at all.