Best Adult Material Hints
In anthropological terms, the one thing that separates us from the good x rated movie (Going On this site) apes is privacy. Sex in public in human societies is so socially transgressive that it's illegal.
Fortunately, technology means we don't need to gawp at others doing it to learn how to do it. We learn most things by watching them happen, through being shown first hand, or through description.
By way of example, a female gorilla born in captivity in Ohio State Zoo had to be shown videos of gorillas nursing within the wild to discover ways to suckle her young; and also a common complaint of new mothers today is the fact that breastfeeding is not instinctual, possibly because the sight of breastfeeding is so rare. As a physical act, sex is no different.
Pornography is a safe way of learning about among the most important things about life.
Sex manuals are already produced for millennia, most famously the Kama Sutra, which does concentrate on sexual positions, although the majority of the book in fact explains a philosophy of love, desire and it has advice about bedroom etiquette (make sure she comes first and try not focusing just on your own pleasure).
Shunga-Shunga:
Erotic and comedic prints called "Shunga" (which translates as "spring pictures", a euphemism for sex) became popular in Japan through the 18th and 19th centuries. In those times, strict confuscian laws controlled public life, but private life remained uncensored and that allowed a national network of lending libraries - often distributing Shunga - to flourish. These paintings were often given as a wedding present, and some were very explicit: if you weren't sure what went where when it came to sex, these images would sort you out. They later became really popular in Europe as well as the US throughout the 20th and 21st centuries, just as they became taboo in Japan.
As we've seen, pornography can clearly be put to good use by educating people about sex. If only we could decide the way to do this effectively. Perhaps we need a mass debate?