PSac:
How does philosophy explain WHY water is wet?
yes thats the question. If i were to try to answer the question from a scientific point of view, i would note that water being wet is related to it being a liquid, as well as the properties of the interface between water and the medium it is in contact with.
For example, mercury and tar are liquids but they are not wet, and water can behave in a non-wet fasion om some surfaces, like certain plants and so on. So to understand why water is wet we both have to understand its macroscopic behaviour (as a liquid with certain density, viscosity, reynolds number, etc), and microscopic behaviour like when it form (or do not form) droplets. Every one of these questions have a huge litterature, often using ab-initio molecular dynamics simulations, see this paper
http://apl.aip.org/resource/1/applab/v96/i10/p101902_s1?isAuthorized=no
I suppose we also have to have a very good understanding of how the skin is composed microscopically, and how the nerves interact with the water interface, again a subject which i am sure has a large scientific litterature one can begin to explore.
Also note that each of these questions open up for a natural research program where we can objectively increase our knowledge of why water is wet, and who knows, perhaps learn something that can benefit humanity.
Now, what is the philosophical explanation? Where is it the rubber meet the road in philosophy and we find a good explanation of WHY water is wet? Saying the explanation could be a number of things is not an explanation -- a banana could be an apple if an apple was a banana, but surely that is not very insightfull, and an apple could really be a nut if we thoght nuts looked like apples, but again this is hardly earth-shattering revelations of truth.
Where is the research program? How does the philosophical investigation work? What have we learned?