01/06/2006 AT 02:15 PM EST
01/06/2006 AT 08:00 AM EST
Nick Lachey reveals in an interview that he used to put on Jessica Simpson's shoes and walk around in them – "It was sort of a kinky thing we liked to get into," he tells Elle magazine.
Other revelations from Lachey, 32, in the interview include him owning up to "typically (being) an overly sensitive person, I lay my heart out there too often." For instance, he tells Elle, "I've never been shy about crying. Sometimes we're so scared of our emotions that we rob ourselves."
Among his emotional admissions: He still thinks his ex is the sexiest woman he's ever seen. He's also a proponent of candid conversation. "I haven't even realized my full dirty talk potential," he claims.
As for Simpson, 25, she's set to give a special performance at the Jan. 10 People's Choice Awards, airing on CBS. She's a nominee for favorite song in a movie for her saucy version of "These Boots Are Made for Walkin'" in last summer's The Dukes of Hazzard.