(This is a Friday Fictioneers submission for December 20th. It's not a personal favourite but I couldn't think of anything else. For other, better,examples please see http://rochellewisofffields.wordpress.com/2013/12/18/20-december-2013/. The picture is copyright Jean L. Hays)
Dolphins," he says, with ominous relish,"are a product of convergent
evolution...They look like fish, swim like fish, occupy the same biological
niche as fish but they're not fish. You get it?"
I nod, because I don't get it.
"So?" I ask.
"Well," he smiles, "It's like this...in front of you. It has handles, hinges, a
window looking out on the the world."
"Exactly," he smiles, "It looks like a door. But you won't be leaving through it.
He's misunderstood the concept but the laughter as he throws back his head is