Age cannot wither her, nor custom stale her infinite variety
From Shakespeare's Antony and Cleopatra, 1606:
Never; he will not:
Age cannot wither her, nor custom stale
Her infinite variety: other women cloy
The appetites they feed: but she makes hungry
Where most she satisfies; for vilest things
Become themselves in her: that the holy priests
Bless her when she is riggish.
See other phrases and sayings from Shakespeare.