When did you discover your tickling fetish?

Man I have no idea, but I always liked using it as a way to mess with friends that either do not hate it or are not weirded out by it.

This comic.http://alexianbc.deviantart.com/art/Amy-s-wrath-Part-1-166565352 I was 17, and I was just casually looking at sonic the hedgehog pictures. When I saw this, not only was I mesmerized, I got hard so quickly that my pants hurt. I wanted so badly to be in Sonic's position. I spent the rest of the night looking at this artist's photos and was an aspiring lee ever since.