The process behind this one is as follows:
Me: Hey, Terra, what are three objects that are sexual but utterly terrifying?
Terra: Hmm. Well, there's some kinds of porn about things eating other things.
Me: Whut.
Terra: Yeah, it's really weird.
Me: That would be too hard. What else do you got?
So basically we brainstormed and the result was an iguana, a prosthetic leg, and a bottle of lube. The colored version of this is also here.
