They pumped water into huge, fortified bunkers miles beneath the surface of Flimwiggle, destroying the drilling equipment afterwards. They filled huge tanker-ships with the stuff, firing them into Flimwiggle's mauvy sun. They even filled byros with water, then left them lying around in the bottoms of drawers until they disappeared, as byros do. And so they never learned to waterski. Waterskiing, even by Galactic terms, is one of the more unusual things one can do when presented with a sufficiently large and flat body of water, and there are so many other things one could do.
Many beings drink the stuff, some live in it, and a surprisingly small number bathe in it.
So few, in fact, that when compared with the population of the Universe as a whole, the number of beings who do anything remotely resembling waterskiing approaches zero, quietly, from the left. Waterskiing originated not on Earth, as many believe, but was invented by a plank-like race called the Frajoom, for whom it was less a recreational activity than a religious experience. The Frajoom believe that their God lives within a nearby black hole, and strap bipedal beings to their backs in sacrifice as they race across the surface of the hole's event horizon, presumably into the waiting arms of their creator. Unfortunately, due to the immense gravitational forces they experience there, the Frajoomy pilgrims are then crushed into tiny screaming nothings by the loving arms of their God. It is interesting to note that while a much larger number of people survive the experience of waterskiing on Earth, they seem to scream almost as much.