The most common form of adult content is a categorized list (more often it's a table) of small pictures (called "thumbnails") linked to galleries.
These sites are called a Thumbnail gallery post (TGP).
A 1995 article written in The Georgetown Law Journal titled "Marketing Pornography on the Information Superhighway: A Survey of 917,410 Images, Description, Short Stories and Animations Downloaded 8.5 Million Times by Consumers in Over 2000 Cities in Forty Countries, Provinces and Territories" by Martin Rimm, a Carnegie Mellon University graduate student, claimed that (as of 1994) 83.5% of the images on Usenet newsgroups where images were stored were pornographic in nature.
The main benefit of TGP/MGP is that the surfer can get a first impression of the content provided by a gallery without actually visiting it.The most abusive form of TGP is the so-called CJ (abbreviation for circlejerk), that contains links that mislead the surfer to sites he or she actually didn't wish to see. Linklists unlike TGP/MGP sites do not display a huge amount of pictures.A 2015 study finds "a big jump" in pornography viewing over the past few decades, with the largest increase occurring between people born in the 1970s and those born in the 1980s.While the study's authors note this increase is "smaller than conventional wisdom might predict," it's still quite significant.The invention of the World Wide Web spurred both commercial and non-commercial distribution of pornography.
The rise of pornography websites offering photos, video clips and streaming media including live webcam access allowed greater access to pornography.Children born in the 1980s 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.The sex and tech conference series Arse Elektronika dedicated their 2007 conference to what they call pr0nnovation.This type of distribution was generally free (apart from fees for Internet access), and provided a great deal of anonymity.The anonymity made it safe and easy to ignore copyright restrictions, as well as protecting the identity of uploaders and downloaders.One of the early Gopher/FTP sites was at tudelft and was called the Digital Archive on the 17th Floor (List of websites founded before 1995).