Girls who wear short dresses simply get more attention from guys than girls who do not. If fashion designers weren't almost entirely chicks and gay dudes, there'd be no need to discuss what hem line length was in from season to season, because every season would be 'as short as fucking possible'.
You can't hide shit in a short dress, a girl can't even hide her crotch when she's climbing in and out of cars, especially if she has some meat in the ass that rides that sucker up. It's a brave choice. It often goes horribly wrong. On Kelly Brook, it's all good.
Photo credit: WENN/Bauer-Griffin/PCN