Just want to start a discussion about belly fetish/ tickling. I feel it's a pretty nieche market
For me, they go hand in hand. The first part of the body that I notice on a woman is her face. Exactly what it is, I can't describe it, but it has to do with the combination of her hair style, eyes and everything else. Then, it's seeing if she is proportioned generally speaking. However, once I start to get into specifics, it's definitely the belly area. If she's fully-clothed, I usually wonder what does her belly button look like. Is it an innie or an outie? I think for me, it stems from wanting to be liked an accepted. I think it's the idea of I like her and does she look like me in this area? If she does, then I think she will like me.
I remember being very self-conscious about this area of my body growing up because of what some people said (not so much being mean, but definitely making me aware about that area of my body due to comments). I think that is where I got into the mindset of looking to see what the opposite sex looks like in that area.
One time I saw two dommes and requested that they tickle me. I remember asking them to be honest and to set up a scene where they tickled me because they had a problem with my body and I needed to be punished. I think I specifically mentioned my belly and bellybutton area. I remember when we started, one of the dommes referred to my request, but neither domme mentioned specifics about my belly or bellybutton. However, they did tickle there. I found that great because it gave me a lot of confidence about that insecurity I had for so long.
Lastly, I'm always disappointed when a woman has navel jewelry. I find it to be a turn off. While the combination of what the woman looks like, the teasing, tickling intensity and her reactions make me decide if it's a great tickling video I'm watching or not, I do find myself always a little disappointed if the belly button isn't tickled, as well as finding that part of the video to be the most enjoyable to watch.