Married to Chicago Bears quarterback Jay Cutler since 2013, Kristin Cavallari says she’s discovered the secret to a successful marriage, and it boils down to three little letters: S-E-X.

“It’s so important to make time for each other, even if it’s just waiting to eat dinner after the kids go to bed,” she writes in a blog post for Cricket’s Circle. “And even if it’s takeout, light a candle and make an effort to connect. Also, you gotta have sex — men need it, and it’s important for the relationship. It doesn’t have to be all the time, but you have to get it in there sometimes!”

Related: It’s A Boy For “Laguna Beach’ Star Kristin Cavallari

In the blog post, the former star of The Hills also discusses such topics as pregnancy style, parenting and her reality TV past, which she now looks back on fondly.

“I went through tough times on Laguna Beach and The Hills, but it was a blast,”; she writes. “I got to call both shows a job, and I didn’t have to work very hard. Laguna Beach was basically us going to high school and MTV putting us in situations we wouldn’t have otherwise been in, which was hard at that age. But for The Hills, I knew what to expect, so I told producers I was game for whatever they wanted me to do – it was my job to play up the villain, and it was a lot of fun! I still talk to Heidi, Stephanie, and Audrina.”;