When Did Sex Begin?

In 1963.  Or at least so we hear from Philip Larkin in his Annus Mirabilis.  It was indeed a wonderful/remarkable year.  I was but a boy in grade school, but old enough to remember all those wonderful songs and not so wonderful events such as the Profumo scandal in Britain.  What ever happened to sex kitten Christine Keeler, by the way?  Brace yourself.

Sexual intercourse began
In nineteen sixty-three
(which was rather late for me) -
Between the end of the Chatterley ban
And the Beatles' first LP.

Up to then there'd only been
A sort of bargaining,
A wrangle for the ring,
A shame that started at sixteen
And spread to everything.

Then all at once the quarrel sank:
Everyone felt the same,
And every life became
A brilliant breaking of the bank,
A quite unlosable game.

So life was never better than
In nineteen sixty-three
(Though just too late for me) -
Between the end of the Chatterley ban
And the Beatles' first LP.