When Sally Rooney's 'Normal People' was translated to the small screen, it won a legion of new fans who never read the bestselling book. And while the sex scenes may be what everyone's talking about, it's the way it handles consent that's truly revolutionary.
For anyone who hasn't seen it, the TV adaptation of the novel follows star-crossed young lovers Marianne (Daisy Edgar-Jones) and Connell (Paul Mescal) as they begin a hometown romance before heading off to university.
For the more intense scenes, the show's makers hired intimacy co-ordinator Ita O'Brien to ensure the comfort of the actors at all times.
By the second episode, when Marianne and Connell become intimate for the first time, the depiction of the sexual encounter is both poignant and rare.
Connell acknowledges that it's her first time. "If you want me to stop or anything we can obviously stop," he tells her.
What follows is a two-way conversation between the couple. It's consent right there on screen depicted in a fluid, easy way.
While Edgar-Jones told an interviewer that seeing communicative consensual sex shouldn't be novel, she said one of the things that she believes is brilliantly done in the series, and one of the things she's proud to be a part of, is the depiction of Marianne's first time with Connell.
Actress Sarah Greene, who plays Connell's mother in the show, has also described the show as "a fantastic piece of art for conversations around consent".
In the wake of the Belfast rape trial and the #MeToo movement, consent became a hot topic, with experts arguing it was a cultural watershed moment to start a conversation with our children about sex and consent.
'Normal People' is another cultural watershed moment for its portrayal of something that is often seen as complicated and difficult to talk about.
According to Noeline Blackwell, the chief executive of the Dublin Rape Crisis Centre, while there's a lot of sex on TV, what's remarkable about this early episode of 'Normal People' is how clearly the central characters communicate throughout their sexual encounter and how conscious each is of the other.
While she says nobody uses the word 'consent', there is true communication throughout and great clarity that this is an encounter they both want.
And whether you agree with sex on TV or not, Ms Blackwell believes this depiction of consensual sex is important.
Sarah Sproule, a mother of three and an occupational therapist, supports families to have conversations about sex and consent. She says she watched the 'consent' episode with a smile on her face.
Seeing consent that is seamless and naturally woven into the narrative, with a to-and-fro conversation between the characters while they are engaging in this erotic way is, she believes, progress in how sex is portrayed on screen.
For parents watching the programme, it may remind them of their own early encounters - we all have our stories and we all have feelings and judgments around these issues as parents, but with help we can tackle our fears around these subjects, according to Ms Sproule.
She's strongly of the belief that we live in a culture where many conversations about sex have been shut down, leaving lots of us ill-equipped to talk about sex comfortably, which she feels could be no different to learning about nutrition from a young age if parents had the right support.
Talking to our children about an issue like consent can begin early and start off small, she says.
It's about talking about the everyday things in life, like what's happening on telly or in advertising. It's slowly building up the skills to have conversations about more complex things, she believes.
"When kids are small, you can have the conversation about consent and it's not about sexuality at all. When two kids are rough-housing at home and one says, 'I don't like this', they've already worked out what they don't like.
"You can help them talk to you and to other children about what they do like and what they don't like."
Ms Sproule points out that we negotiate with other people about everything in life.
Whether we want to go on a date to the cinema or out for a walk, negotiating skills like these are laid down early with our children as we teach them about everyday life.
If 'Normal People' does anything, it reminds us that we were all Marianne or Connell at one point in our lives - awkward and young and muddling along.
It might just also prompt us to think about how we'd like to bring our own kids up to be open and honest and able to have the kind of conversations we've seen in 'Normal People'.
In a cultural context, that would be quite the revolution.