As youngsters both I and my brother were encouraged to pee in pools by our parents. We'd be guided away from toilets if we needed to pee before getting in, for instance, then being told "Just do it into the water" once we were in. When I did I'd be praised, "Good girl!" and told "In the pool is the right place."
Well at first anyway, as we soon realised it was actually naughty and didn't need any encouragement! 🙂 In turn I also encouraged my own kids to pee in pools while they were youn