"Lighten up"
You see, I have problem with posts like this.First I'm like - "Woah, I can't imagine someone would be so insensitive to make joke like this!" and get all fed up and upset.But then... then I freeze, because next example is something that I can imagine myself saying.    "Oop, Katie's got the low cut dress on today! I know where I'm sitting!"

I... I'm at loss of words. I was trained during my teenage years, that it's cool to say things like that. As I'm getting older, I see how sexist and demeaning this is. But it's really hard to break this habit, and this "Hey, it's just meaningless joke, right?!" line of thought.  I try, I really try, but sometimes I forget myself.On a similar note - I have exact same problem with how I perceive woman and man having multiple sexual partners. 
"Good key opens many locks, but good lock is opened by only one key" and all that bullshit - I know that it's ridiculous to hold woman and men to different standard in this regard, and I mostly learned to don't do that, but my... instinct that was ingrained in me by society tells me otherwise.I find myself struggling to suppress my subconscious mind in this regard, and frankly, I don't know how I can help it.Edit for clarity: I don't have problem with such posts being written and upvoted, quite opposite actually, I'm glad they are written and read. I have problem with how posts like this make me feel.