Swizz, whose real name is Kaseem Dean, went into detail in an interview with US Weekly about the reasons he and Keys are able to collaborate so effectively.

“Marriage is definitely a big word, but look at it like your best friend. The communication is there. We’ve never had an argument. Since we’ve been together, our kids [have] never seen it; never seen us raise our voice [or] never seen us yell. Never seen us curse at each other. Why? Because of communication,” 

“When you yell at each other, no one is really listening anyway. Nothing gets solved in each other’s yelling,” Swizz said, adding that he doesn’t “own” Keys and she doesn’t “own” him

“People think they can own people. You can’t. It’s not property that you own. There’s a whole human, right?” Swizz explained. “So, we’re very clear on that. She’s her own boss. I’m my own boss. That’s how we make magic when we come together. I think that helps because people start getting very territorial and making their partner property, and I think that’s the biggest mistake.”