There is a very logical explanation: being under the ground, truffles are unable to disperse the spores in the air and therefore in the surrounding environment, to recreate new "fruits". But thanks to their persistent smell, they are able to be identified by different wild animals such as rats, squirrels and foxes, but also by domestic ones like the truffle dog, and at the moment when they extract it from the ground, in that instant, it can spread the spores. The truffle therefore wants to be found and ... eaten! Only in this way it will be able to reproduce itself. What a beautiful trick of nature.