Body inflation, or just inflation, is a paraphilia in which a person derives sexual pleasure from the idea of themself or others being blown up like a balloon or otherwise filled with some sort of substance.
Inflation content varies, mostly dependant on what part of the body is being inflated, what it's being inflated with, and how big the body gets. Though, other circumstances surrounding the fantasy play a part, (such as if the subject of the inflation is willing or not), these parameters are what I'm going to use to create my classification system.
The 3 previously mentioned parameters, location, size, and substance, can be interchanged with eachother in a sort of dressup doll situation.

Classifications for size include