heidi klum strapless blonde bob

Grin and bare it. Heidi Klum has no qualms about being naked in front of her parents or kids. Photo: Dimitrios Kambouris, WireImage.com

When it comes to being naked, Heidi Klum prefers to keep it all in the family.

In an interview with the May issue of Britain's Tatler magazine, the 36-year-old Victoria's Secret model admits that she is so relaxed about nudity, she often bares all in front of her mom and dad -- and vice versa!

"My parents are still naked," she tells the magazine, according to the Daily Mail. "I mean, it's not like we're hippies, but if they happened to be in their room changing or something or someone comes out of the shower, they're not, like, 'Oh my God. No. Close the door.'"

And Klum -- who reportedly grew up taking camping trips with her folks to nude beaches in Italy -- admits that she maintains an open-door policy in the L.A. home she shares with hubby Seal, 47, and their children, Leni, 5, Henry, 6, Johan, 3, and Lou Sulola, 5 months.

The German stunner told February's InStyle: "If I go to the bathroom and my kid walks in, I'm not going to be like, 'Oh my God! Close the door!'" -- what is it with that bathroom door? -- "They see their parents naked all the time. We are not ashamed."

Clearly. The "Project Runway" host and her singer husband can be seen wearing not a stitch of clothing in artistic silhouette portraits hanging in their bedroom and private powder room.

Klum
-- who appears topless except for a thick slathering of what looks to be sunscreen in the April issue of Allure -- says she doesn't mind if her kiddies catch an eyeful. "It's not like, 'Hey, Mom and Dad are naked, come check it out!'" she laughs.

We don't know about you, but the very thought of seeing our parents naked elicits a big "Ewww!" here at StyleList. But then again, our parents didn't look like Heidi Klum and Seal.

And don't forget this dude, whose letting-it-all-hang-out lifestyle could land him life in jail.