S&B

"It would be easy to condemn Sartre and De Beauvoir, to dismiss their sex lives as squalid and find therein reason to undermine their intellectual or political projects. This would be to miss the great edifice that De Beauvoir constructed out of their mutual experiment in living; the often gruelling honesty they both brought to bear on each other; and the ways in which the living and changing organism that was their partnership shaped both their philosophical writings and their fiction."

http://www.theguardian.com/world/2005/jun/10/gender.politicsphilosophyandsociety