I think the 'everything is a fungi' joke is going over many of your heads.
Currently, animals and dwarves can reproduce. However, they reproduce from a distance. You can have a cage of male dogs on one side of your fort, and a cage of female dogs on the other side of the fort, and the females will all get pregnant despite no physical contact.
This means that they obviously become pregnant from a distance. The answer? Spores. The dogs aren't dogs, they are dog shaped fungi that release spores. Elephants aren't elephants, they are elephant shaped mushrooms. He isn't saying mindworms should be in the game, he says they already are. Just in the shape of all the various creatures in the game.
Also, they dont grow wheat. They grow cave wheat. Cave wheat is like wheat, but it grows in caves. Appropriately named I must add. The exact nature of how they get energy to thrive in the caves is currently unknown, so feel free to argue about that. It cant be thermal energy, because the caves are pretty cool. Can't be light because no natural light could possibly make it to 99% of our forts inner river. My guess would be a disgusting mixture of deadbodies / feces / kitchen waste as a mulch, with the crops growing on either the released decomposition gases or taking nutrients straight from it, but that sounds like it would create a nightmare case of miasma.
[ June 28, 2007: Message edited by: Ravendas ]