Worksafe, except for your howls of laughter

This is a (small) remarkably funny archive of cartoons drawn from spam subject lines.

It displays that fascinating trait that I will call Compound Humor, where one is alright, two is amusing, and you probably can't keep from laughing at three.

Some humor is distinctly more prone to this than average, I think. The Far Side and Engrish.com are other good examples.