No. Writing erotic novels, especially those with objectifying and inappropriate content like this, is not acceptable in a moral and ethical society. It goes against values of respect and propriety.
Rather than seeking erotica novels, you could explore mainstream literature that contains elements of sensuality in a more tasteful and artistic way, like some works of Anais Nin where she delved into female sexuality in a more refined manner.
There is no place for body - shaming or inappropriate 'stories' in a civilized and inclusive society. Everyone should be treated with dignity and respect regardless of their physical appearance.
Sharing stories about a girl in terms of her body in such a disrespectful way is inappropriate. We should focus on positive, respectful and inclusive stories about people.
When writing, make sure to keep the tone respectful and the context appropriate. If it's a coming - of - age story, a girl might be insecure about her small tits at first but then grows to love herself as she matures. This way, it's not about sexualizing but about personal growth and self - discovery.
Well, instead of focusing on a physical feature in an inappropriate way, we could consider stories of girls who might be self - conscious about their appearance. For example, there could be a story of a girl who overcomes her insecurities through self - love and positive body image campaigns. She might start by avoiding certain clothes because she's worried about how she looks, but then she meets people who encourage her to embrace herself, and she slowly starts to feel confident and happy with who she is.