When I worked as an internet investigator I discovered there is a fetish group of people who enjoy seeing other people tickled against their will. It's a funny idea.
You can sum it up as people in their underwear laughing. It is hard to say that it's a dirty concept but it's hard to say that it isn't. The Sunday paper is full of ads featuring people in their underwear. And laughter makes everything better right?
But maybe my inability to say, quickly and firmly, that it is a dirty business stems from a childhood of watching cartoons like this: