I've studied Rome, trust me, the empire fell because they held no love for the tiddy.
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More seriously, though, you can broadly glean a period's sexual-aesthetic preference through their art. With grains of salt, of course, considering that sculptures were made to an ideal, not necessarily a reality, but no doubt there's some amount of realism in Imperial/post-Hellenistic classical figures.
https://www.metmuseum.org/art/collection/search/254697
Here you go, the Western female physical ideal for the better part of 3000 years. I'm sorry to say that most Romans probably weren't lolicons.