what makes something wet? being in contact with water (water molecules touching). take some wet paper, there are paper molecules touching* water molecules, so it's wet. replace the paper molecules with other water molecules. why should it not carry that the new water molecules are also wet? they are in the exact same situation which the paper was. perhaps an argument can be made that one water molecule alone is not wet, but many are.
* molecules can't truly touch, but they interact through intermolecular forces, which is close enough