From what I know, the Greeks and Romans held men with large penises in contempt as in their eyes; they allegedly couldn't control their sexual urges while men with smaller ones where approved because they embodied the Greco-Roman concepts of virility and masculinity. I'm curious to know what both cultures thought of big-breasted women, although I have the sneaking suspicion that they would have served as targets of mockery. Do any written sources state or somehow imply their views on such a topic, if such texts even exist?
From the article "Roman Beauty Culture" (Wilner, 1931):
[T]he type preferred for the young woman was the tall, stately build which Catullus (Carm. LxxxVI) admits Quintia possesses and which the lover in Terence's Eunuchus (vss. 313-16) contrasts favorably with "our girls, whom their mothers want slope-shouldered, with bound breasts, to make them slender. If one is a little too well-conditioned, they call her a prize-fighter and reduce her rations."