I had planned to write a more thoughtful pondering of this, but cold medicine dizzies have kind of cut off my language centers. Short version:
We can talk about objectification, as a concept, and whether or not it is good – I know it pisses me off, often – but we shouldn’t ignore the fact that women and men are both capable of it. (advisement - lots of sweary language at the link).
Because I find it both amusing and irritating that it is assumed that (straight/bi) women don't enjoy looking at attractive members of the opposite sex - they do, and can be just as weird and piggy about it as men can be. That this is news boggles my mind - all those screaming Elvis and Beatles fans ~40 years ago weren't just hollering over musical talent.
Culturally, perhaps it's excusable in teenage girls because they're not supposed to know better, and what's eyebrow-raising about the Twilight* fandom is that 1) it's also older women doing the screaming [ed. Why?
Why? Pattinson needs a comb more than anyone on the planet] and 2) the main star is playing along, rather the way hot women stars are expected to pander to mainstream straight male tastes (also not new - Tiger Beat posters, anyone?).
*
Have not seen the movies or read the books, though I've read excerpts (crap prose alert!). I could write a tidy screed about the sexist problems of Twilight but others have done it more cogently than I ever could, and have actually suffered through read the source material.