inflation
Inflation is the act of pumping or otherwise introducing pressurized air, gas or fluid into an enclosed space in order to expand and increase its volume and size. The act of growing larger as a result of being inflated is expansion.* A sexual fetish or paraphilia for these subjects is inflatophilia. - From WikiFur A fetish involving a character, or certain parts of a character, being inflated with air, gasses, water…
