Katy Perry and John Mayer are comfortable enough together to dress like slobs now, and you know what that means: They want to breed.

A source told More magazine (via UPI), "John has given her the confidence to jump out of the rat race. With John, she feels like herself. She wants to nest. She's gained a few pounds, is taking a much-needed break from work and perhaps is even getting her mind and body ready for pregnancy."

So taking a break from work and eating an extra slice of pizza every now and then means you want a baby? Because if so, a lot of us have quite a bit of explaining to do. And some nurseries to decorate.

Perry's split with ex-husband Russell Brand was rumored to be over kids, so take this with a grain (or entire shaker) of salt. Still, the source thinks Perry and Mayer are meant.

"John really likes the fact that Katy is so independent and not needy and clingy like the other girls he's dated," the source said. Oh. We bet Jessica Simpson, Jennifer Aniston, Minka Kelly, Jennifer Love Hewitt and more are stoked.

The source added, "This is the first time John's felt so strongly about a girl. She's played her cards perfectly. They really do bring out the best in each other. It wouldn't surprise me at all if he proposed.''

Just imagine the self-important guitar ballads he could write about it. But on the upside, maybe he'll finally start doing interviews again. He's really good at those.

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