Saoirse Ronan's new movie, Ammonite, is about Mary Anning, a shy young woman who was a pioneering fossil-hunter. Her achievements were never credited in her lifetime by male academics, but the value of her work has been rediscovered. The film also introduces an apparently fictional theme in Mary Anning's life - a same-sex relationship, which is said to be hot stuff, when Kate Winslet as Mary falls for Saoirse's character, Charlotte.
Relations of Anning, a Victorian spinster who died in 1847, have asked why her story has to be made "sensational". Barbara Anning says there's no evidence that Mary had any sexual relationships.
But, some ask, why must a sexual element be inserted into the story of a reticent palaeontologist? Is her life not worth celebrating just for uncovering unknown Jurassic marine fossil beds in Dorset that added greatly to scientific knowledge?
Don't be daft. Sex scenes increase viewing figures and Ammonite is garnering advance publicity because of its skin-to-skin Saoirse-and-Kate scenes. Bridgerton, described by one commentator as "a bodice-ripping bout of orgasms", is the most-watched show on Netflix, seen by over 82 million households.
Scenes from Sally Rooney's Normal People - those with nudity and sexuality - have made their way on to porn sites, as have what one critic described as the "fantastically inventive shags" from the BBC series Industry.
If pornography sources are running extracts from mainstream TV drama, does that mean that porn and screen drama have merged? Or, if some viewers like a bit of explicit sex with their screen entertainment, who are others to judge?
The death of the world's most famous pornographer, Larry Flynt, earlier this month, illuminated the dilemma he represented in his lifetime.
Is one person's erotica - and freedom of expression - another person's offensive material and disgusting pornography?
Flynt, who became a multimillionaire with the success of his magazine Hustler, was for some a champion of free speech, guaranteed in America's First Amendment.
For others, he was a revolting person who published images of naked women being fed into a meat grinder and also published intrusive nude photographs of Jacqueline Kennedy Onassis. Hustler became the world's fastest-selling men's magazine.
It also started a conversation about pornography. Previously, feminism had generally opposed censorship and supported freedom of publication.
But for Gloria Steinem and feminist intellectual Andrea Dworkin, Larry Flynt was the worst example of the exploitation and degradation of women, likely to prompt rape. Quite a lot of conventional porn, when they came to examine it, really was about treating women as sex objects.
Flynt became a hate object himself for a divergent range of foes. He was shot at and paralysed from the waist down by a white supremacist for having featured interracial sex in his publications. He liked to offend and boasted of the inclusivity of his targets: "Blacks, whites, Jews, Christians, rich and poor".
He insulted the American flag by wearing it as a nappy when arraigned by the Supreme Court. He ran for Governor of California with the slogan: "Vote for a Smut-Peddler Who Cares". He formed an unlikely friendship with Ruth Carter Stapleton, Jimmy Carter's sister and a Christian preacher who opposed sexual repression. Flynt had a poverty-stricken childhood in Kentucky and Indiana. By 32, he had been married and divorced three times; he fathered five children by different mothers, one of whom became an anti-porn campaigner. The woman he really loved was a bisexual who had Aids and drowned in her bath after a heroin overdose.
A movie was made about his life, The People vs Larry Flynt; but the wider jury remained undecided as to whether Flynt was a free-speech champion or an odious figure encouraging sexual abuse of all sorts. His excesses were deplored even by other pornographers.
And yet, if mainstream drama is now more explicit about sex than ever, perhaps Flynt's influence is triumphant: the free flow of sexual material affirmed as normal.
Those who upheld the often draconian Irish censorship practices back in the day - where a word like "breast" could get a book banned - claimed that loosening the boundaries of decorum would "open the floodgates". Perhaps they were, technically, correct. Floodgates open!
Maybe no two people will agree on what is pornography and what is just an enticing portrayal of a natural activity. Perhaps no two generations will agree, either.
Older people, with some exceptions, don't care for explicit sex scenes: they think the pursuit is private (or perhaps they now think, like Lord Chesterfield, that "the pleasure is momentary and the position ridiculous"). Younger generations, if the success of Normal People - streamed 65 million times - is a measure, aren't bothered.
Issues of censorship and freedom have moved on, too. It's now more about race and transgender issues.
There are all kinds of things you can't say, publish, or express without being censored or "cancelled".
Ironically, some conservatives would now suggest that, here, Flynt's crusade for freedom of expression is warranted.