But it is all just thought, what D. H. Lawrence calls, with an almost audible contempt, sex in the head. If I actually went to the massage parlor, it would still be sex in the head. (A great deal of what passes for physical sex in this world is sex in the head.) It wouldn't belong to that deeper experience of the body that I felt in massage and during that morning with my wife. Often, as I've sat on the cushion, I've noticed that sexual thoughts weren't accompanied by any feeling in the body at all. My body didn't want sex. It was all in my head.
— David Guy, The Red Thread of Passion