He was friends with Thom Gunn, a Movement poet (himself British, and openly gay) and took to heart Gunn's The Allegory of a Wolf Boy as his own. It fits. Sacks was doctor by day and a young experimenter by night.
Allegory of a Wolf Boy
The causes are in Time; only their issue
Is bodied in the flesh, the finite powers.
And how to guess he hides in that firm tissue
Seeds of division? At tennis and at tea
Upon the gentle lawn, he is not ours,
But plays us in a sad duplicity.
Tonight the boy, still boy open and blond,
Breaks from the house, wedges his clothes between
Two moulded garden urns, and goes beyond
His understanding, through the dark and dust:
Fields of sharp stubble, abandoned by machine
To the whirring enmity of insect lust.
As yet ungolden in the dense, hot night
The spikes enter his feet: he seeks the moon,
Which, with the touch of its infertile light,
Shall loose desires hoarded against his will
By the long urging of the afternoon.
Slowly the hard rim shifts above the hill.
White in the beam he stops, faces it square,
And the same instant leaping from the ground
Feels the familiar itch of close dark hair;
Then, clean exception to the natural laws,
Only to instinct and the moon being bound,
Drops on four feet. Yet he has bleeding paws.