I found her memoirs fascinating, because they kept reminding me of the psychology book Escaping the Self by Baumeister. The distance Catherine experiences when engaging in sexual acts, where she completely loses a sense of identity and becomes a mere body, sounds strikingly like the loss of self that Baumeister describes in his book. Not being an elaborate, thinking, rational self is liberating.
You hardly ever find complete darkness, and people actually usually prefer the vagueness of half light. I myself would like total blackout because I could then experience the pleasure of sinking into a sea of undifferentiated flesh. (...) I am not afraid of being glimpsed unawares because my body is but a mingling part of the air around it and the continuum of other bodies connected to it. (p. 99)
On the other hand, the complete lack of intimacy and emotional connection that Catherine expresses ultimately make her encounters seem cold and empty. She lets herself be led completely by others, and never seems to act on her own desire.
I just left everything up to chance. I paid no more attention to the quality of sexual relationships. In cases where they didn't give me much pleasure, or they even bothered me in some way, or when the man made me do things which weren't really to my liking, that wasn't reason enough to call them into question. (p. 199-200)
What I did find refreshing was that she feels no guilt or shame whatsoever for her unconventional life style. The Sexual Life of Catherine M. is not a confession, nor does it preach or attempt conversion to a certain lifestyle. Some readers might find its contents morally objectionable, however, especially as Catherine does not mind sleeping with other people's spouses, should they cross her path.