(Possibly) NSFW. See details inside, please.

After i read @papayalily’s question i decided to put no details on the main page.

I understand there is no correlation between breast size and milk production, so why is it that some women have ‘normal’ size breasts while some others have enormous ones.
I mean so big that it looks weird, if you would see the same difference in size in, for example, noses or hands or pinky toes (which we don’t).
I hope it is clear what i am trying to say here?
Breast size FF would mean that my nose (for example) could be as big as a tennis ball.
So, why did Mother Nature took care of it in this way?