Fictitious, only because most true tickling stories are pretty simple and boring ("haaaay, i tickled my co-workers sides at work today really fast, she was really ticklish yaaaaah amazing!"), nowhere near as sadistic and detailed as some of the best fiction stories on here. A first-rate fantasy is always better than a third-rate reality, and most of the true stories are kind of boring anyway... a poke in the sides here, tickling a foot for 10 seconds, etc. Hardly enough to even get me to quiver, let alone go full-on erection. It's great that people got to tickle other people, but since it wasn't me and it's all in my imagination, give me a long, detailed fiction story.