tickledpink00, for myself, the fetishes came in two parts. I have had a foot fetish since about the age of five. For some reason, around that time, I started asking babysitters to smell their feet. Most of them probably thought I was a silly kid, so they said yes. From then on, anytime I saw a barefoot older girl or woman, I got an excited feeling, even if not sexual, yet.
The tickling didnt come until much, much later. I began reading articles, in leg magazines, about tickling, in my teens. Slowly, they grew on me. In 1997, I answered an ad of a straight male into tickling, and began exchanging letters with him. My pen pal told me of his tickle fetish, and described his past tickling experiences with his girlfriends. Through my knowing him, I got more into talking about tickling, and was like "Wow, ticklish girls, really cool". From there, my tickle interest, turned into a fetish.
I think fetishes can develop in many ways, and at different times of life. Some people believe it stems from childhood. For me, the foot fetish did, but when I was little, I had no clue that tickling could be exciting.
That's how my interests came about.
Mitch