For those of you guys who still Just Don't Get It (and I know there are a lot of you out there), I have a scenario that might give you some perspective.
This will probably be lengthy, but worthwhile, so bear with me. This is a hypothetical situation, so please do not object that it is unrealistic.
Imagine for just a moment that you are heterosexual (I know this may be a stretch). Now imagine that the majority of males are actually homosexual. Furthermore, imagine that homosexual males look at heterosexual males as nothing more than sex toys.
Now imagine that TV, magazines, billboards, and just about every other medium contains pictures of scantily clad, muscle bound males. Imagine that the worth of a man is mostly based on the size of his muscles, and the only way *you* can get muscles like the models is by using drugs which induce unrealistic muscle growth.
Girls look down on guys who do not have unrealistically large muscles. Everywhere you go, people comment on the size of your muscles and whether or not they are attractive (and thus, whether or not you are attractive). If you are not attractive, people have little interest in speaking to you or being friends with you.
Imagine that in order to feel better about yourself, you wear clothes that show off the muscles that you do have, which aren't so small in their own right.
Unfortunately, a consequence of this is the constant attention of homosexual males. They honk at you when you walk down the street. They pull over and offer you rides. They are bigger than you are, and one in every 16 has raped a heterosexual male at some point in his life. They catcall, whistle, and occasionally grab your ass. They call you "honey," "sweetie," and "girl," and call you sexy.
When you complain about it, people tell you that you have no right to complain because you wear shirts that show off your muscles.
Perhaps now you understand what it is like to live as an objectified person, and experience unwanted sexual attention. If you are not at least slightly homophobic, this example probably didn't help at all.
Now that you understand what unwanted sexual attention is like, perhaps you can better understand why women do not like it.
Once you understand that, it should be quite easy to understand why women do not appreciate being objectified.