Why is breast size such a large issue for most women?

RBT-RS
So, I notice on here on questions like "What do you hate about your body the most"? That breast size is a common issue. I mean, sure, a lot of men like big breasts. That doesn't, however, mean that ALL men like them. I, myself, like smaller breasts. It annoys me to see so many people with A / B cup wanting to have D cup, as, I just don't really find that attractive. I mean, you don't need to seek male approval for everything.

Can anyone explain this obsession to me?
I do not like my breast size, I wish they were bigger.
I am happy with / content with my breast size.
I do not like my breast size, I wish they were smaller.
Select gender and age to cast your vote:
Updates
+1 y
I realise I should have added a poll option for "I'm a guy!" :o
Why is breast size such a large issue for most women?
18 Opinion