"After that sweet birthday fling, I was to have no sex for the next 35 years."

Writes Oliver Sacks in his new memoir "On the Move," reviewed in the NYT by Andrew Solomon, who complains that Sacks's "transition into celibacy is presented without explication." Sacks has known that he is gay since at least when he was 18 (in 1951), when he told his father the news. His father told his mother, and his mother "came down with a face of thunder, a face I had never seen before. 'You are an abomination,' she said. 'I wish you had never been born.'"

Then she left and did not speak to me for several days. When she did speak, there was no reference to what she had said (nor did she ever refer to the matter again), but something had come between us. My mother, so open and supportive in most ways, was harsh and inflexible in this area. A Bible reader like my father, she loved the Psalms and the Song of Solomon but was haunted by the terrible verses in Leviticus: "Thou shall not lie with mankind, as with womankind: it is abomination."

That's from the book. Solomon wonders why Sacks was celibate for 35 years:

He explains only that he had trouble with �bonding, belonging and believing.� Sacks has cared for many people � especially his patients � but the kind of love on which marriages are based seems to have been not merely elusive, but bewildering to him (though he has been seeing the same psychoanalyst for nearly 50 years). Sacks did not so much avoid convention as fail to notice it; he understands difficult facets of the human experience with singular clarity, but emotional rules that are legible to most people seem to bewilder him.

By the way, the word "celibacy" (or "celibate") does not appear in the book. Nor is there "sexless." And "no sex" only appears that once (quoted in the post title). Is Sacks really as bewildered as Solomon seems to think? I'm looking at the book � which I just bought � and I see that Sacks says that he "regarded [his] sexuality as nobody�s business but [his] own, not a secret, but not to be talked about" and that one closest friends when he was a young man told him he thought Sacks was "asexual."

We are all creatures of our upbringings, our cultures, our times. And I have needed to remind myself, repeatedly, that my mother was born in the 1890s and had an Orthodox [Jewish] upbringing and that in England in the 1950s homosexual behavior was treated not only as a perversion but as a criminal offense. I have to remember, too, that sex is one of those areas� like religion and politics� where otherwise decent and rational people may have intense, irrational feelings. My mother did not mean to be cruel, to wish me dead. She was suddenly overwhelmed, I now realize, and she probably regretted her words or perhaps partitioned them off in a closeted part of her mind.

But her words haunted me for much of my life and played a major part in inhibiting and injecting with guilt what should have been a free and joyous expression of sexuality.

I think that's some explication of what Solomon calls the "transition into celibacy." But many readers � including me � would like to see the subject of celibacy examined by someone with such a fine mind and such long experience with the condition. There must have been some good in it, to stay with it for 35 years.