While fans can have a lot to say about celebrity couples' age gaps, for those in the romance, the concern just doesn't add up.

Take Kristin Cavallari's relationship with Mark Estes, for instance.

"I understand what it looks to the outside world. I really do," the Laguna Beach star, 37, said on her podcast Let's Be Honest last month. "I get that. He is not a typical 24-year-old in the same way that I don't think I was a typical 24-year-old….I really think age is just a number. It's what you've been through in your life, how you were raised. There are just so many factors that go into maturity other than age."