Both Mayday and Gunner love water!
Gunner will swim ... kinda. He thinks he can and does well for 5 minutes then stops paddling. We're getting him a life vest since he enjoys swimming until the point where he thinks he can float.
Gunner has always been a water addict. Used to swim in my parents pool, now he has a kiddie pool in the back yard to splash in. We take him to the beach and he splashes around and chases the waves. He lives to get into any water he can - puddles in the road, ocean, bath tub, a bucket, pools, ect.
We left Mayday alone when it came to water, thinking he'd either enjoy it or not. He now races us to the shower and sits in there with the water pouring on him. He jumps in and out of the kiddie pool and sticks his head under the water for 5 seconds at a time. We haven't tried swimming yet, but he certainly loves water.
Be careful though - they will attack under water. Gunner thinks he's saving you, but really he's drowning you.