The film seems to side with the sex always gets in the way thesis, but obviously that's bollocks. I have a female best friend of many years, for example, who isn't my wife. Some people get judgemental about that, but I don't care. The only people whose opinions matter in all that is my wife and my best friend's husband, and they are both not only happy but very glad about our friendship, as they think it has made both our respective marriages better! (We are all friends, to be clear, and have been for years.)