Don't be so quick to despair, I think most of us here are at least partly affected with a "laughing fetish", as you put it 🙂
We need more details; so the act of tickling someone holds no real interest to you? The laugh itself is what counts?
Well, my friend, as some of us here are steered by our interests into, you know, podiatry and such, I recommend you become a comedian 😛 Or better still, just go to a stand-up lounge and bask in the warm glow of laughter...