“The pains series” referred to a series of images commonly circulated on the old internet with the intent to cause pain and disturb the viewer.

These images were passed around untagged, uncensored and unwarned for, often under deceptive links, to force unwilling and unsuspecting people to click on and view them.

Many of these images were gore images from rotten dot com, but they also included things like medical waste, pornography generally considered to be unappealing, etc.

Some of the more famous and prevalent images were:

Lemon party: a bunch of geriatric people engaged in sexual activity

Goatse: A man stretching his anus extremely wide in full view of the camera.

Tubgirl: a fat woman in a bath tub, i believe the tub was filled with supposed fecal matter.

2 girls 1 cup: two women supposedly consuming fecal matter

Harlequin fetus: a deformed fetus

Those are the ones I remember most clearly. They were impossible to avoid.