I'm Dr Helen Fischer, I'm a Biological anthropologist and I study love. I've written six books that sell all over the world on romantic love. Where how it evolved what happens in the brain and why you fall in love with one person rather than another? I really had a wonderful childhood I grew up in a modern house a glass house right next to Philip Johnson's glass house in New Cananan Connecticut And it was thrilling We had a lot of land We had big flood lights You could see the deer and the foxes and the woodchucks and the possums all around the house all the time I have an identical twin sister so I always had somebody to play with When did you first learn about sex? And my father and mother really believed that sex was an important part of a partnership. As a matter of fact when I was 18 my father gave me about 20 books on sex. There was nothing puran in our household. I never even saw him hold my hand. He was a an executive at Time magazine. ...