This is patently untrue. Unless, suddenly, there is potential for a gaping hole of nothingness to be present in the chest region on the female anatomy, then there are always breasts. No, they're not created equal, but they're still breasts.
Besides, the concept of "delicious flat chest" doesn't imply loliconism nor pedopehlia. As an unfortunate bevy of the female population of the world can demonstrate, there's always an audience.