There are many definitions to what "fairer sex" means but I think it implies that women are more pleasing to the eye than men are. For example To many people the woman in this picture is better looking than the man because of her feminine features. I think that's why people say that women are more pleasing to the eye than men are.
That guy is not my type, but he definitely looks better than the girl... I don't know man never thought about it, like i find many men pleasing to the eye:) but maybe compare the most attractive girl u know to the most attractive man... i think its even, but we all have different tastes. maybe some people just prefer feminine features?
I dunno, I have a really hard time seeing what women mean when they call certain guys "cute". I look over at the guy they're referring to and it's always just some average looking dude who's scrappy looking. I really don't understand what women see in us physically other than "He's funny and confident!"