Inside Sofia Richie's 21st Birthday Celebration

See why the two are ready to get a new place together.

Sofia Richie may be the 21-year-old in the relationship, but according to 36-year-old Scott Disick, she's the one who "calmed" his wild ways.

In a sneak peek from Sunday's new episode of "Flip It Like Disick," the couple talk about getting a new pad together after dating for over two years and why they're ready for a change.

Richie says that when the two of them started dating, Scott's house "looked like a bachelor pad" -- something she'd love to stamp out of any future home together.

"I think it'd be fun to move, maybe I can put my touches on things," she says. "I'd just like some involvement. This is very you, this is very manly Scott, bachelor pad. I feel like it would be nice to start over, now that I think about it."

As for where they'd look, both of them seem to be partial to Malibu ... because who wouldn't?

Despite the 15-year age gap between them, Scott goes on to credit Sofia for being a stabilizing factor in his life in a confessional.

"I think it's hard, anywhere, to find somebody to be comfortable with," he says. "The truth was, without her, I was always looking for somebody or something. She's definitely been that little piece that's calmed me down and made me a better man and made things easier in my life."

Watch the two check out some new houses when "Flip It Like Disick" airs Sunday at 10pm.

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