deduction:

Perhaps there are a few adult women out there who ridicule the small breasted- i don't know; but the majority of adult women don't care about other women's breast size and don't discuss how small other women's breasts are. So the issue would either have to come from onesself or from one's perception of what men want, etc...

Am i wrong?

Well, ridicule may be strong, but as a small-breasted woman, I'll tell you that it's not unusual for me to receive comments from other women about my chest. It's not that women stop me on the street to point and call attention to my general lack, but it's in the form of subtle comments like "well, you have to be curvy to wear something like that," (actually I am curvy, just not on top), or in the case of store sales clerks "you're not very big, are you?"

I could and do write those people off as tactless idiots, who clearly have their own issues to deal with, but the fact is, over the course of a life time, these things can add up and affect your attitude towards yourself. Not to mention the near constant images of breasts that surround us -- all the "bones and boobs" models out there and the tryanny of the D cup on television makes a woman feel that to have full breasts is the defining feature of a woman's life.

Men, on the other hand, tend to comment on my nice ass, or my pretty eyes and beautiful smile. I'd have to say that in some ways men are more forgiving of an "imperfect" figure than women are.