Like many other things in life, the degree and kind of the sexual objectification of women varies along a spectrum of behaviours and attitudes.
At one extremity of the spectrum, it could fairly be said that you'd find pornography and prostitution. At the other end, you'll find very repressive and proprietary attitudes towards women based on women's purported sexual nature.
In a very interesting piece, Holly at Feministe, writes about a ultra-orthodox Jewish group in Israel, who take religious teachings concerning modesty to an extreme and ask that women wear Taliban-style burqas.
“The whole of a woman is genitalia. It is forbidden for a man, other than your husband to see you.”
Go read it.