Thankfully, Lewis P Wellington is growing up, and is contemplating the idea of settling down. He's been running up to the kitty instead of running over the kitty. And finally, a hiss or a growl is being recognized as a warning to stay away instead of an invitation to rumble.
Today, I looked over while at work and saw for the first time in a very long time, they were playing. I didn't want to disturb them, but managed to record some of it with my phone.
BTW - you may notice the chair that they are playing on. It's my comfortable office chair... the one I'm supposed to be able to work in 10 hours without a sore bum. I don't get to use it. Instead, Himself sleeps on it while I sit on a much less comfortable kitchen chair. It's the only way I've found to keep the dang cat off my desk while I work.