'Emotional fuckwittage'... is spreading like wildfire among men over thrity. As women glide from their twenties to their thirties,... the balance of power subtly shifts. Even the most outrageous minxes lose their nerve, wrestling with the first twinges of existential angst: fears of dying alone and being found three weeks later half-eaten by an Aslatian. Stereotypical notions of shelves, spinning wheels and sexual scrapheaps conspire to make you feel stupid, no matter how much time you spend thinking about Joanna Lumley and Susan Sarandon.
And men... play on the chink in the armour to wriggle out of commitment, maturity, honour and the natural progression of things between a man and a woman.
From Bridget Jones's Diary, by Helen Fielding.
Yo no lo limitaría a los hombres de 30; creo que empieza un poco antes.