They did not know what to do with the frank depictions of sexuality and endeavored to hide them away from everyone but upper-class scholars. In , Denmark became the first country to abolish censorship, thereby decriminalizing pornography, which led to an explosion in investment and of commercially produced pornography. Although nineteenth-century legislation eventually outlawed the publication, retail, and trafficking of certain writings and images regarded as pornographic and would order the destruction of shop and warehouse stock meant for sale, the private possession of and viewing of some forms of pornography was not made an offence until the twentieth century. The scholarly study of pornography, notably in cultural studies, is limited, perhaps due to the controversy about the topic in feminism. With the invention of tiny cameras and wireless equipments voyeur pornography is gaining ground. Children born in the s onward are also the first to grow up in a world where they have access to the Internet beginning in their teenage years, and this early exposure and access to Internet pornography may be the primary driver of the increase. They have used lithographs, the printing press, and photography. The Victorian attitude that pornography was for a select few can be seen in the wording of the Hicklin test stemming from a court case in where it asks, "whether the tendency of the matter charged as obscenity is to deprave and corrupt those whose minds are open to such immoral influences. The invention of the World Wide Web spurred both commercial and non-commercial distribution of pornography. Through a series of sexual events, we see the empire build into a fast-paced, erotic journey for both the customers and the professionals.