My fabulous British journalist friend Jane Mulkerrins travels the globe interviewing celebrities (Kevin Kline, Liv Tyler, Billy Bob Thornton, Tilda Swinton, Victoria’s Secret models … it goes on and on) but that’s not all she does. She recently interviewed Esther Perel, a couples therapist in New York. The headline on Jane’s article in the Telegraph tells you this is going to be good reading:…