This strange image is a reblog from this 30 March 2014 post at Infernal Wonders. It is an example of what’s often called an inflation fetish. I’ve blogged about this here way back in 2010 (in the context of people who got turned on by the Violet-blowing-up-like-a-blueberry scene in Willie Wonka and the Chocolate Factory (1971) and ended up with a curious fetish (and yes, there are such people), and even earlier in a long post at Erosblog in 2009 (you can find an illustration if you scroll down). The image is accompanied by this text:

“Um guys I think you had better stop soon…” Sally writhed about filling way beyond Jo and Kath as they giggled at their size. “We’re gonna make you super sized” laughed Jo as she held the tube in place. “Maybe we will let you burst like a big ole water balloon!” snickered Kath. “Please no!” whimpered Sally as she ballooned to a huge size. “I don’t want to pop!”