Why do women like to show significant cleavage, but get ticked when men stare at it?
reported for forum change
Moving this to IMHO.
You’re expected to be a gentleman even while being a pig. 
Do you have a cite for this?
IME, most women who show cleavage are quite OK with being ogled. If you have proof of the contrary, please provide it, since you’re the one who is bringing the claim.
Otherwise I’m calling a bullshit straw man.
I have a cartoon on my wall that shows a flat-chested woman sitting in a plastic surgeon’s office. She says “I want them big enough that I can yell at men for looking at them.” The caption is “Why men will never understand women.” 
But otherwise, what running coach said.
Because it’s rude to stare. More importantly, you probably just aren’t one of the men that particular woman wanted to entice. If you’re at home alone with your wife, does she get ticked when you admire her body? I’d hope not.
Because you’re supposed to be discreet about these things.If you’re doing it like this, you’re doing it wrong.
Seems a batface doesn’t bother them!
My auntie is like this. She does not mind white guys looking, but whenever she catches a Latino doing it, she gets very offended.
So, if this thread is regarding some particular woman…perhaps she just doesn’t like you…
They need air. Please don’t stare.
Eloquent.
I think women don’t mind men checking out their cleavage when they wear something that calls attention to that area. They just don’t like it when men act like fools, either by being unable to look at anything else, by making comments, or by assuming that an invitation has been made.
They do it to weed out the real men from the pigs?
Try not staring. Girls might like you more. Just an idea.
Or at least cut back on the drooling and honking sounds.
They were staring at me first.
The word some needs to be inserted here.
Some women…
Some men…
And some women do like it when some men stare.
I understand: no bow tie!
It took me years to perfect the honking sounds.
On the other hand, I did on one occasion have a woman walk up to me in a bar, pull her top down, and shove her cleavage in my face. Of course, one can never be 100% certain about these things, but I feel fairly confident in saying that she actually wanted me to look.
I also think she wanted me to buy her a beer. Although, honestly, I can’t be sure exactly what she wanted, since my brain completely bluescreened.
(I also didn’t look. Cleavage can actually be scary when it comes at you aggressively at 20 miles per hour.)
so blowing on them is just being helpful.