I'm sympathetic to sex-positivity and intellectual intentions, but I don't have a sense of how well this aspect of human sexuality fits into HN right now, so I'd only like to suggest a few ideas, from trying to be considerate:
* Researching and learning about human sexuality is good.
* Not everyone has the same ideas about sex-positivity, and, in general, that's the individual's personal business.
* At least in the US (I don't know about other places), we have a long history of sex/gender being involved in unfairness and in making environments unwelcoming/hostile to some, including in the workplace, and we haven't fully fixed that. For that reason, in some environments, such as in the workplace, I think most sex-related stuff should be off-limits for mention. Given the history and unresolved problems, it's too easy to inadvertently be unwelcoming.
* Also regarding the workplace, a company doesn't want to be sued, and so probably doesn't want any unsanctioned mentions of sex/gender at all. (For example, HR might flip out, were the URL to which this HN post links being passed around in company email accounts.)
* This post seems accidentally juxtaposed with yesterday's (?) comments insensitivity, on a top post about a female computer scientist who was instrumental in the historic scientific first of black hole imagery. HN is not a single coherent identity, but HN coming right off that comments poo-show, with a taxonomy of reddit porn, doesn't seem like the best timing for having the work perceived as the author did.