Don't get me wrong, I also get those kind of thoughts about certain parts of guys bodies , but I always find it amusing to see that reaction within me. It also doesn't affect the way I treat that man - I just enjoy it. And often the 'art-like' way of looking at them follows those thoughts, especially if I take an interest in getting to know them.
I have no problem with that kind of objectifying. But I do object (...pun intended?) to the hamburger-attack one being the standard one and getting justified because a woman doesn't cover up somehow, or worse - just for being a woman.
A raw instinctual desire to bash someone's head in is something society expects you to channel into just airing your frustration and trying to resolve the conflict. This to me is no different from the same instinctual desire to motorboat some boobs that are on display
Though, if you want to get nitpicky, this kind of hamburger-drooling is more akin to the way people seem to lash out at others in frustration and bully them - which unfortunately happens still way too often in society. And there too, way too much justifying and 'he made me do it by being so stupid'- tripe is used to absolve themselves from their responsibility.
As for the objectification of men - it's an understandable backlash, but wrong all the same. It aint my kind of feminism, that's for sure.