Ummm sorry to rain on everyone's parade but like some of the implications in the OP and in this thread are not very well thought out.
The problem with the degree of sexuality in culture right now is that it is almost exclusively commodified and controlled by cis het white men. The problem is rape culture. The problem is monopolies in the porn industry. The problem is the criminalization of sex work. In other words, the fact that sexuality is more visible in society is not a problem--the problem is that only a select few control how sex is portrayed culture, and those same people reap most of the profits of leveraging sex in culture.
These ideas are all wrong. First of all, banning or curtailing pornography does not erase it from society--it simply forces it underground, where models, sex workers, and erotic artists will be forced to navigate much riskier environments. We are seeing the consequences of this happening right now in the US, where misplaced ire over online pornography (stoked by right wing Christian organizations under the false pretenses of "protecting children") has spurred senators to develop bills that will restrict individuals' ability to create pornographic content without giving up their identities. Fortunately these bills have not been passed yet, but if they do pass they will create harsher environments for people in porn and sex work, and the latter industry has already been devastated by the equally misguided SESTA-FOSTA.
Besides the fact that restricting porn wouldn't fix any of the issues with our current culture around sex and sexuality, it would also decrease the avenues by which queer people can express themselves. Like it or not, a lot of LGTBQ+ culture emphasizes the importance of sex because mainstream cishet patriarchal society demonizes queer sex and queer people. It is vital that we be able to create and view representations of ourselves, both in sexual and nonsexual contexts. Since mainstream society deems even chaste depictions of queer relationships as somehow "more adult" than straight relationships, a pornography ban would potentially restrict queer art that has little to do with sex. And to be blunt, because US (and global) sex education is so abysmal, pornography is currently the only avenue that many queer people have to explore their own identities. I first learned about trans people from pornography. Flawed as those depictions might have been, I sure as shit would have transitioned far later in life had I not found trans women via pornography.
Likewise, OP's attitude about sex work is completely wrong. A demand to buy and sell/barter for sex will always exist (especially if you are a woman with little other lucrative options under capitalism), and criminalizing it just pushes sex workers into unsafe environments where they have less control over their labor. Decriminalizing sex work is the only way to ensure that sex workers (many of whom choose the profession because their marginalization and/or disabilities prevent them from obtaining livable wages by other means) can organize for their rights as workers, and can live with dignity without the fear of persecution. OP called themselves a Marxist...well, decriminalizing sex work is the Marxist position. Doing so would allow sex workers to more readily control their labor, and would weaken monopoly hold on both legal and criminalized sex industries.
We could actually change cultural attitudes towards and media depictions of sex through proper sex education, education about queer people, education about consent, decriminalizing sex work, and dismantling monopolies in the sex industry. Formally repressing the expression of sexuality in media would simply amplify the disparities and injustices already present in our current sex culture.