Some years back I read parts of Porn: Myths for the 20th Century, by Robert Stoller (Yale University Press: 1993). He was prof of psychiatry, now deceased. It featured interviews with some of the 'luminaries' of the 1990s .

Here's a bit on it from Amazon (I read it so long ago I'd be hard pressed to give a full review):
From Publishers Weekly
Stoller's self-styled "ethnographic" study of heterosexual pornography consists of reprinting transcripts of his interviews with porn actresses, actors, directors and producers. Much of the material has the aura of a hardcore flesh magazine. Affecting a nonjudgmental attitude, he writes in a short concluding chapter that most porn scripts are not "simply anti-female . . . these stories are often full of freedom--women depicted having a marvelous time." Most pornography "does little good and little harm" except for child porn, he avers. A UCLA professor of psychiatry, Stoller qualifies his position in his summary analysis, stating that anger or rebellion against one's parents and society underlies most pornography, that it exploits men as well as women and that a desire to degrade or be degraded is an element of pornography.
Copyright 1991 Reed Business Information, Inc.