Heidi Klum Reveals Her Sexy Secret To Skipping ‘7-Year Itch' In Marriage To Husband Tom Kaulitz

"It just comes naturally. … There's no rule book to follow. I think it just comes naturally, or it doesn't," Klum, 52, exclusively tells Us Weekly while promoting her and Diplo 's new single, "Red Eye," which is now available to stream on all platforms.