In the 19th century the inventions of photography and later of motion pictures were quickly put to use in the production of pornography. Pornographic films were widely available no later than the 1920s, and in the 1960s their popularity enjoyed a massive upsurge. The development of videocassettes in the 1980s and digital videodiscs (DVDs) in the 1990s enabled the wide distribution of pornographic films and further encouraged their use because they could be viewed in private. Pornographic images and films became even more widely available with the emergence of the Internet in the 1990s. The pornographic industry became one of the most profitable on the Internet. Apart from providing a vast marketplace for commercial pornography appealing to many diverse tastes, the Internet also encouraged many amateurs to post images of themselves, images that often challenged traditional concepts of beauty and sex appeal. The use of webcams opened the industry even further to amateurs, allowing individuals to post live depictions of themselves, often for fees. The Internet also increased the availability of child pornography.

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