Kourtney Kardashian speaks out about her attachment parenting philosophy in the April issue of Redbook.

The somewhat controversial method is based on attachment theory, which states that children feel most secure when another person is physically present. A strong emotional bond is said to be formed if caregivers consistently give sensitive and emotional care to the child in addition to constant physical presence.

For parents, this can mean bed-sharing -- allowing children to sleep in bed with them from infancy -- and taking all expression of emotion, including tantrums, as serious efforts at communication.

"It's what came naturally to me; I didn't plan it," Kardashian tells the magazine. "When I had Mason, I just felt really attached to him and wanted to bring him everywhere. He ended up sleeping with me, and I breastfed for 14 months."

Son Mason, 4, and daughter Penelope, 19 months, both sleep in bed with Kardashian and boyfriend Scott Disick every night.

"They go to sleep in their rooms but end up in my bed, sometimes within minutes," the reality star says. Kardashian says that alone time with Disick can definitely be a "challenge."

"It's...something we talk about constantly," she admits. "Mostly there are times each night when the kids are in their own rooms, and sometimes it even lasts all night. Every night is different."

"I'm sure the family thinks I'm insane," the reality star acknowledges. "I have no idea where it came from because I definitely didn't sleep with my parents unless I was sick or something... I wasn't reading attachment parenting books before; it's just what came naturally to me."

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Kardashian spoke to the magazine at an event for her Kardashian Kids collection. The clothing is currently just for girls, but she says she would "love to do boys' clothes" in the future. Until then, the star will continue to enjoy motherhood and creating "whimsical and trendy pieces" for the line.

"My entire life changed when I became a mother -- my priorities, my understanding, appreciation of life, and my relationship with God."

The April issue of Redbook is currently available on newsstands.