It's fun singing with other people who are really good singers. There's something kind of poignant about braiding a couple vocals.

I was starting to play the ukulele at the same time I was having all these conversations with [the late Ramones guitarist] Johnny Ramone, these intense tutorials staying up late and listening to the music he grew up on, and picking up what's a great song and what makes a great song. He was all about lists and dissecting songs, like what's a better song by Cheap Trick: "No Surrender" or "Dream Police"? Sometimes you'd be surprised by the answer. It was an interesting dichotomy between hanging out with the godfather of punk rock and starting to play the ukulele. They came together.

Pearl Jam bassist Jeff Ament and I get excited talking about making record artwork or working with T-shirt designs. The least exciting part for us is talking about the finances; it's like going to the dentist for us. But we at least try to do it in a creative way and put our stamp on it. I can only think that we create something that's worth the value of that dollar.

Wait a minute, yes, those are human heads.

Pretty much at all times music motivates me. How can I say this without sounding in any way proud of myself? Obviously I've always written songs that are critical of our government, and talk about our times. Hopefully you attempt to be timeless while doing it.

One thing you might suggest to a young band is don't get involved in any kind of long-term contract because everything changes on a bimonthly basis: The way people hear music and access it, the way it is distributed.

So my one kid's 4, my other kid's 4 months, I'm 44, Barack Obama is the 44th president - it's all lining up nicely here.