Do you think it is ethical to have romantic desires for people with good looks? I know the obvious (pop culture) answer is yes. One may even assert further that it is natural to do so.
However, my point then is that some desires, albeit natural, are unethical. (If I don't have money on me and I am hungry, I may feel the urge to steal some food.) And even though most people may feel that it is okay, the general public may be very often wrong.
My reasoning is:
(1) We should evaluate people only on their choices and not on conditions they haven't achieved by making choices.
(2) People don't choose to look good or bad.
Conclusion: Therefore, it is unethical to grant people ANY advantage based on their looks.
A friend of mine, against this argument, tells me that for instance, a mathematician has not chosen to be born with her talent, so we shouldn't also value her mathematical works. This seems like an inextricable tangle!