For those of you old enough to remember any of the following: a gopher site, WAIS, 127.0.0.1, Earthling, Netscape, Netcom, Compuserve, a BBS, or even AOL was, below is what was the precursor to what online porn was like.
Before DNS's or flash or even jpg images on a www were the original frontier of the internet was much different back in the 1990's than it is today. The inception of domain names other than IP addresses or flash movies and especially HTLM5 even existed, there were ASCII images.
These images were images that were constructed of ASCII characters, or for the most part keyboard characters. The equivalent of playboy centerfolds constructed of typewriter characters. In the last 20 years the internet has changed quite a bit to allow the transfer of jpg images and swf or flv or even mp4 images or better yet, youtube.
Consider this a flashback to what the equivalent of what porn was 20 years ago, on the internet.