I don't have a problem if Rob happens to look at another woman, but honestly he has NEVER openly stared, or watched them even before he and I were together. I have heard stories from his friends (they were "complaining" of course) that when they would go to Hooters etc to get some wings and chill out, he wouldn't even look at the waitress or the staff at all...he's look at a TV, his food, or his friends...
I think it is different types of guys that do different things. I wouldn't say ALL guys do it, but the ones that do, it is just their nature... Just like some women will gawk at a hot guy (the ones I work with do it all the time) just like the men do to women.