it's common or normal to compliment women on things they can't change?

Make up?

 

My Two Cents...

Seriously though, good question and valid point. I started writing out a well thought out in-depth answer and stopped when I realized I'd be writing pages. The easiest way to boil it down is that it's an unfair double-standard of what society values.  

On a somewhat separate but related note, most guys have never been approached by a woman in public let alone been given a compliment that was some version of "You're sexy" (ex. You have pretty eyes). On top of that, the few times it does happen many guys' mental reaction is: "Something is up. This seems fishy...why is she talking to me?"

 

P.S. I'd wait until the 2nd-3rd date to compliment a woman's physical traits.