Our twisted relation with beauty

While there are many things that could be read into the title of this post, I shall at the very outset, in a fashion that is somewhat contrasting with my usual self, bring to light the specific context and meaning intended.
(The above sentence of course reassures me that I'm still in the element I have come to know as my own! But yes, moving on..)

Why can't I walk up to a girl in a train and say "You're one of the most beautiful persons I have ever met", without the very real possibility of getting lynched?
Why/How have we as a society evolved in a manner that so closely intertwines beauty appreciation and leching?

I understand that mother nature has programmed us in a way that much of what we do since our voices are done cracking, revolves around the theme of procreation. Is it that this instinctive understanding has now transcended to the realms that dictate how we behave at a social level?What then, becomes of the artiste who seeks beauty, and upon finding the same is filled with the desire to express it.

Even as I write this, images of MF Hussain with his muse in Madhuri, or that of a fashion photographer in the midst of an assortment of exposed physical beauty come to mind. Those are cases, certainly, where appreciation is taken to be at a level above leching. So does my initial question transform to a class issue: If one is a renowned artiste, then said appreciation is aesthetically tasteful, else it is a sympton of female objectification. Said class consideration then would certainly extend to the subject as well.

More later I guess.
This was about all I had to say for now.
Cheers duniya..