3:54 She sums it all up: Because if he is that desirable (tall, rich, good looking,) he'll be snapped up when he was 20 to 24 (in university,) again when he was 24 to 28 (in the work place,) then when he's 28 + (when dating after achieving some measures of success.) There is no hope of older sheng nus in her 30's, having to compete with younger women. So lower your standards when you're still young!