According to English scientists 45 seconds are enough for ladies to choose if her potential partner is good for her. Actually it would not the very first glance, but the sixth.

Well, the first  five seconds ladies stared at eyes to define their color and check if they look clever. Next ten seconds are needed to study clothes and to be certain that there is now weeding ring on his finger.  The third glance lasts five seconds and is focused on his hair dressing. The fourth and fifth last five seconds each and are needed to evaluate hands and footwear. And finally last 15 seconds are spend to study bearing,  step, gesticulate manner. All these created the first opinion which is the solely true according to science.