“At the time, I was interested in reconciliation after fights, and I wanted to know how bonobos did it compared to chimpanzees. Very soon I discovered that they were much more sexual in everything they did, and that interested me — not so much for the sex part, even though that became a very hot topic, the peacemaking-through-sex thing — but much more how they have such a peaceful society, because they are much less violent than chimpanzees.”

The Bonobo in All of Us (2007)
Context: It is true that the chimpanzee is dominance-oriented, violent, territorial. But it's also cooperative in many ways, and so that side is sometimes forgotten. The bonobo is sensual, sensitive, sexual, a peacemaker, but also can have a nasty side, and that's sometimes forgotten. So both species are sort of the ends of the spectrum, and we fall somewhere in between. Clearly, we have both of these sides in us, and that's why I sometimes call us "the bipolar apes."

As quoted in "A Role About Winter for Julie Christie, a Star in Eternal Spring]" by Alan Riding in The New York Times (18 April 2007)

Playboy interview, May 1971

Contributions of Jane Wagner, The Search for Signs of Intelligent Life in the Universe (1985)

The Search for Signs of Intelligent Life in the Universe (1985)

In a letter written from Markree Castle, Sligo to his wife dated July 4th 1860. Charles Kingsley: His Letters and Memoirs https://archive.org/details/charleskingsleyh00kingiala/page/308 (1877)

Source: Fool for Love

As quoted in "Profile: The Soloist" by Joan Acoccella, in The New Yorker (January 19, 1998); reprinted in Life Stories: Profiles from The New Yorker https://books.google.com/books?id=KDhjzXAjyUMC&pg=PA62 (2000), edited by David Remnick, p. 62.

Larocca, Amy (2005). "Marc Jacobs' Paradoxial Triumph" http://www.nymag.com/nymetro/shopping/fashion/12544/ NYMag.com (accessed April 19, 2007)