Man is by nature bisexual, so there is nothing shameful in the story told from the mouth of Tom Tykwer. Still, in its provocative statement, the cinema is afraid of being bold, only partially exposing the philosophy of the unconventional triumvirate, otherwise preferring the search for ways that will make each of its participants understand that freedom of morals must prevail over prejudice. Another thing is that the love triangle itself looks artificial, and it can be called a love triangle with a big stretch.
What we have? The average married couple, whose joint life has long outgrown just a convention, has cracked. If in this situation, Hannah's sexual intercourse with another man looks like a phenomenon almost natural, then Simon's passion for a one-sex lover that emerged from an empty place can hardly be attributed to his sexual dissatisfaction, it simply cannot be explained logically. Any manifestations of the feelings of each of the three main characters are reduced to animal instincts, eventually developed into universal affection. But the act of triolism is still far from an act of merging souls, and thinking stereotypically does not mean wrong.
If Tom Tykwer wanted to prove the opposite, he simply could not do it. About what he would not say, he speaks with a smile. Ironic color gets even the most serious things, which inevitably leads to the thought "maybe a film with a film - no more than a witty joke?" After all, for such a bold statement about the need to step over and forget about biological determinism, as a remnant of the past, the director did not have enough arguments. But if you consider the "3" as an intellectual farce, it becomes clear that with a sense of humor, Tom Tykwer is in perfect order and the film is nothing but a real comedy of morals.