Why twenty-seven is a woman's ideal age

From a male perspective I suggest that 27 is the ideal age for a woman. She retains the vibrancy and beauty of her youth but with just enough experience to add insight into the ways of the world though not so much to dull her optimism.
Anna Karina – the Danish born film actress who was a muse of new wave movie director Jean-Luc Godard – was 27 when she made Anna, a French television musical in 1967.
The joie de vivre expressed in one of her songs in the show Roller Girl written by Serge Gainsbourg exemplifies what I mean.