Fetish interests definitely shift or better yet as in my case expand and evolve.
For me as a young boy I found looking at female feet exciting and initially embarrasing. I never was able to figure out why I was so drawn to beautiful female feet but after a while I needed to smell them & touch them, fondle them. This led to tickling and very mild foot worship (I'd kiss or lick a woman who's feet I was tickling when she was not looking or sometimes when I was hiding under a table where no one knew what I was doing and also became attracted to the scent of a woman's feet).
I quickly began to adapt to tickling and full fledged foot fetishism like a fish does to water. Seeing the response I received from these ticklish women when my fingers would tease and tickle them at any opportunity possible pushed my fetishes to a new level.
The women I tickled as a boy were older - with the exception of neighborhood girls I played with - my mom's lady friends, babysitters, relatives including aunts and cousins and many wore nylons. I became quite excited at the sight and silky feel of nylon clad feet. The way my fingers would glide so effortlessly over the slippery, shiny, silky material hooked me in a hurry. The women seemed to appear even more ticklish when in hosiery versus their bare feet. Even the scent of their feet intermingled with the smell of nylon and shoe leather acted as an aphrodesiac of sorts and I'd often be dizzy with delight as I tickled away.
As I got older restraining, tying up or rolling ticklish girls in a blanket or sheet to prevent them from getting away while I explored their ticklish feet added bondage to the list.
Soon my fingers began to wander up my ticklish victims legs and again seeing the way they responded to these new sensations and how tickling them in certain spots drove them wild while tickling other spots got them to react in other wonderful ways convinced me that I needed to broaden my horizons for my sake and for that of my ticklees. Full body tickling and teasing was the result.
I then began experimenting with tickle tools adding yet another dimention to the experience.
Some women have also introduced me to the pleasures of role playing. I find that great fun as well especially knowing how much it excites my play partners.
Dominance and total submission is also requested by some of my tickle playmates during a session.
Recently after years of being an exclusive tickler I began experimenting with my ticklee side. I now love being tied and tickled if a play partner is into being a tickler during a session. If not I have absolutely NO problem tickling her beyond her limits for as long as she can handle it.
All of my fetishes interlink which provides me with the opportunity to meet with women that have varied passions, desires, fetishes & fantasies of their own and as I mentioned earlier it's all been an evolution of sorts.
Who knows where things will go next but it's a fun ride and I'm going to continue to enjoy it.