Z told me on Friday that she is planning to make a unicorn.
Me: How will you accomplish this?
Z: By breeding a horse with a rhinocerous.
Me: You think that will work?
Me: Why don't you just attach a horn to a horse?
Z: Because it will fall off and everyone will know that it's not a unicorn. No animal has a horn exactly like a unicorn.
Me: The narwhale has a horn that looks a lot like a unicorn.
(A lengthy conversation about how to catch a narwhale ensues, including a comment about "will it fight me")
Z: I will breed a horse and a narwhale to make a unicorn.
Me: How will you do that?
Z: I will get a giant tank of water, and stable the horse next to the narwhale. Then I will put a paper cutout of a heart on the tank, so that whenever they look at each other they will think they are in love.
Me: What if, instead of a unicorn, you get a whale with horse legs?
Z: I will still be famous, because I will have made an animal that can walk on land and swim in the sea.