One of the best ways to show your human you love them is to get as close as possible then shake off all you lake water. Their reaction is always to say "thank you" and squeal a little. Daddy! loves this, so I do it to him often.
You can get this process started by running into a lake, preferably after a stick:
With your fur soaking wet, run back toward your human with a cute grin on your face and give them your best shake:
When you're all done shaking, sit down and show off a little tongue. Being adorable (and having a funny little brother behind you) helps. Humans find this irresistible!