Ball or obsession?

The dogs have followed me out to the porch. Molly is content to sunbathe and contemplate the blades of grass. Lucky, however, thinks porch time equals play time. He brings me his favorite blue Orca ball (it floats), places it at my feet, and hyper-ventilates with excitement. I throw the ball. He retrieves it. I throw the ball. He retrieves it. You get the idea. I'm beginning to think the poor dear is a bit obsessive-compulsive. Or am I?