I'm okay with watching a movie about selfish, sex-obsessed characters with no redeeming qualities whatsoever (i.e. Wolf of Wall Street; American Psycho) BUT it has to come from an honest place within the story and not a contrivance the writer thought would be cool because it's taboo. Every moment, every beat of this movie is forced and it's a shame because Naomi's and Robin's performances are breathtaking but the journey their characters take lead them right back to square one. They learn nothing at the end and it seems the only reason this film was made was to get a rise out of audiences.
--Spoilers past this point--
Two best friends (who may or may not have gone past first base when they were little girls) grow up, marry, and have children. Now, I'm assuming they led a life in all that time. They dated boys during their teen years, had a vigorous sex life, settled down, married, had kids, and carried on with their professional careers. But the film sloppily fast forwards in time and shows the now 40-ish mothers on the beach ogling their sons surfing waves as if they've never seen them before or in a half-dressed setting. Maybe it would have worked for me if the mothers were bicoastal (however that works in Australia) and hadn't seen each other or each other's sons in years then maybe, just maybe, you could make the argument that they'd see the 20 year old sons in a different, more sexual light. But that's a big, hard, wet, tight maybe.
Surprisingly, the pacing of the film is great but the stilted plot overshadows it. Why is Ian so into Roz? Is it because he's still in grieving trying to get over the death of his father? Is it because he hates his mother Lil? Is it because he's trying desperately to mask his homosexual feelings for his best mate Tom? The film never hints at any of these reasons but I feel any of these options would have been better than what we are given...which is nothing. Ian's into Roz because the script says so and thus it must be.
It might be easier to answer why Roz might initially be into a Ian, a handsome young man, but after the one-night stand turns into a "relationship" we're never given her reasons for carrying on as she does. Wait, I forgot, we are given one reason...the script says so and thus it must be. We ARE given a valid reason why Tom sleeps with Ian's mom Lil: sexual revenge. And we are shown scenes with Lil at best rebuking Tom's advances and at worst hesitantly accepting them, but after their one-night stand it never makes sense why Tom continues with the relationship when Lil was never on his radar to begin with and he could easily sleep with any girl his age without even trying. Ian slips Roz sexual glances and flirts with her by sharing a cigarette right before they partake in their dalliance. This never happens with Tom and Lil. Therefore, I am left to presume Tom only meant to sleep with Lil because he wanted to get Ian angry and make him feel the same pain he felt. But, alas, Tom's plan backfires because he actually falls in (temporary?) love with Lil. Why? Because the script says so and thus it must be. In the end, what we are left with are two couples who can't see past their own genitals to recognize the pain they are inflicting upon their innocent children and spouses (aka insufferable, unforeseen, insignificant others).
I'm perplexed as to the reasons why the writer/director Anne Fontaine wished to make this film. Something tells me it was for "selfish" reasons. Maybe Anne was personally going through something and wanted to explore the end result through this fiction. I hope she found her answer because I certainly didn't.