Sri... please don't mistake my occasional sprinkle as hosing a dog brutually. He's basically a good dog & frightened of losing his domain to me & I just gave him a sprinkle as he liked to lick water droplets & play with it & that kept him from barking at me. I would NEVER do such a thing if it did hurt him in anyway. All the dogs that I've met have never "feared" water... as they are natural swimmers they love water. They just don't like it to be forced into their nostrils for fear of asphyxiation (yet another survival trait). Showing who the boss is, is also seen in other behaviour like making you come down to his level to pet him or putting a paw on you to show you are indeed below him. Looking straight into his eyes & a firm "no" in the local dialect should tell him where his place is.