The actress covers the July issue of Red magazine, where she opens up about her relationship with hubby Francois-Henri Pinault.
Hayek and her billionaire beau said "I do" in 2009, and after seven years of marriage, Salma says the key to a good relationship is chemistry.
"Sex is not the key to a happy marriage, but it's a side effect," she tells the mag. "Although not every day! If it's every day then it loses its charm."
"It's so important to maintain your chemistry," she reveals. "You have to continue to laugh, continue to explore, continue to have fun with each other, continue to have romance."
Though the Oscar-nominated actress has had an extremely successful career in Hollywood, she says her biggest accomplishment is her marriage.
"A good marriage, full of love, is my biggest accomplishment," she says. "Home is where my husband is. He is home. Everything outside of the family nucleus is an adventure that you're living together."
The "Grown Ups" star says being in tune with your sexuality is also equally important in a relationship.
"Even though I struggle every moment with my own judgment of my body, I'm in touch with myself," she admits. "I try to be really aware of every muscle. It is sexy. Sexuality, what other people see in you, is enjoying your body. Involve your senses in your life, and you will become sexy. Dance, and not to look good. If you dance terribly, still dance."
"It might in the moment not look sexy, but this interaction with life makes you sexy," she continues. "And even if you're on a diet, enjoy your food—please! It's a very Latin point of view."
The "Frida" star also gushes about her 8-year-old daughter, Valentina Pinault ... revealing that motherhood, later in life, can be more difficult.
"I had a child late in life...I've had that yearning, that longing, and that pain...I always wanted to have a lot of children, and I was not able to. My body, as a miracle, had one," she explains. "The huge blessing I've had is that my husband has three other children. So I have four. And they are all so different."
"It takes a lot of work and mummies are very tired because most of us work and life is exhausting, especially if you are an older mom like me, but you have to make the effort. And if you have a smart child, it's harder," she says. "Now it's so easy to just entertain them (with a screen), and you don't have to go through the complaining for an hour about dragging them places. Drag them, and make them a part of your life. It's about the human connection, and the things they can learn from participating in life. Otherwise, isolation starts to happen."
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