Hello! 
I have a very vivid imagination. and I've had TONS of whacked out thoughts.
Thinking about doing anything as a fantasy hurts no one. Instead of keeping your thoughts to yourself, you just wrote them down. That's brave. Most of my weirdest daydreams I would not post for feedback.
You tickled each other when you were children. There is nothing wrong with what has already taken place.
The problem is that you are an adult now, and have developed tickling as a fetish. I think it's fine to fantasize about tickling her. I would say you shouldn't actually do it in real life. It's just my opinion..... 🙂

I have a very vivid imagination. and I've had TONS of whacked out thoughts.
Thinking about doing anything as a fantasy hurts no one. Instead of keeping your thoughts to yourself, you just wrote them down. That's brave. Most of my weirdest daydreams I would not post for feedback.
You tickled each other when you were children. There is nothing wrong with what has already taken place.
The problem is that you are an adult now, and have developed tickling as a fetish. I think it's fine to fantasize about tickling her. I would say you shouldn't actually do it in real life. It's just my opinion..... 🙂