Inflation isn't really my sort of thing, but I found a scene when I was checking out this surreal anime called Kaiba. It's confusing (to me, so far), but what I know is that it's about the ability to add/extract good/bad memories, and even extract someone's memories to implant into another body.
Naturally, there's all sorts of weird and kinky applications to this, but then again, the whole Kaiba universe is rather odd and abstract.
In episode 2, one character apparently is utilizing this aspect to have some sort of orgasm through inflation. A rather tragic ending though.
http://www.veoh.com/videos/v7407630T...670571&rank=10
It takes place at 16:56, but I recommend not only watching the episode from the beginning, but also watching episode 1. It's a pretty surreal series.
On a side note, an extremely large-breasted woman is seen starting at 12:56.