Every one of these little blue balls is a thought about something that needs to be done, a decision or a problem that needs to be solved.

Click here to view larger portion of the female brain (listen to the nifty musical background).

A man has only 2 balls and they take up all his thoughts.

Related:

Autology: John Dale's blog,
18 Nov 2005,
Blue Balls Machine

The Blue Balls Machine is a wonderful Rube Goldberg contraption that serves no purpose except to move, well, blue balls from one place to another. It's not a game, and not exactly a work of art; I don't know what I'd call it, exactly, except that it's mesmerising.

A quick look at how it's done reveals that the whole thing is one large (2.4MB) animated GIF, which is impressive enough by itself, but it's even more impressive when you realise that (a) it tiles (try resizing your browser window as big as it will go), and (b) the movement of the balls wraps around the image like asteriods in the old arcade game.

These animations are examples of YTMND:

Wikipedia,
YTMND

YTMND, an initialism for "You're The Man Now Dog", is an online community centered on the creation of hosted web pages (known within the community as YTMNDs or sites) featuring a juxtaposition of a single image or a simple slideshow, which may be animated and/or tiled along with optional large zooming text and a looping sound file. Images used in YTMNDs are usually either created or edited by users.