The female breast is a symbol of femininity and plays a key role in the female body image. However, factors influencing the preferences for different breast shapes and sizes are still not elucidated. In particular, the role of the emerging social media in breast perception has not been analyzed yet. A representative cohort of 1,049 adults completed a web-based questionnaire containing hyperrealistic 3D models of the female breast in the United States. A machine-learning algorithm (Classification and Regression Tree [CART]) was implemented to identify the most influential factors. The study was able to identify the frequency of pornographic and social media consumption as the most influencing factor for altered breast preferences. Although digital media exposure did not alter satisfaction with the own breast among female participants, the tendency to undergo or history of conducted aesthetic surgery correlated with higher access frequency to digital media. Taken together, the overpowering impact of social media and pornographic consumption on the own body image was shown in preference alterations for different anatomical aspects of the breast in the whole population and distorted self-perception about the breast in female participants.

中文翻译：

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数字媒体在影响女性乳房感知方面发挥着关键作用

女性乳房是女性气质的象征，在女性身体形象中起着关键作用。然而，影响对不同乳房形状和大小偏好的因素仍未阐明。特别是，尚未分析新兴社交媒体在乳房感知中的作用。一个由 1,049 名成年人组成的代表性队列完成了一份基于网络的调查问卷，其中包含美国女性乳房的超逼真 3D 模型。实施了机器学习算法（分类和回归树 [CART]）来识别最具影响力的因素。该研究能够确定色情和社交媒体消费的频率是改变乳房偏好的最大影响因素。尽管数字媒体曝光并没有改变女性参与者对自己乳房的满意度，接受或进行过美容手术的倾向与较高的数字媒体访问频率相关。综上所述，社交媒体和色情消费对自身身体形象的压倒性影响体现在整个人群对乳房不同解剖学方面的偏好改变以及女性参与者对乳房的扭曲自我认知。