I've never had an inflation fetish or found it at all interesting; however, I'm open-minded and I'm curious why y'all are into it?
Like, what about it is attractive? Does it have any kind of specific symbolic reason for being sexually appealing to you?
I'm just really curious. Like, for example, I'm into bondage because I enjoy letting the other person take control, you know? I'm just really curious what's attractive about inflation.
I can, of course, only speak for myself -
Symbolically, it lies in the tension between the inside and outside of your body. The idea is that something inside you is basically revolting against the constraints of your skin, your clothes, and social norms. Thus, what's specifically attractive is the humiliation of inflating, the size you become, the tightness of your skin and clothes, and fear of bursting. As to why this turns us on, you'd have to ask Freud to probe deep into our subconscious for that.
Here's a question for you: How did you come across this fetish? Anything in particular that makes you curious?