It was apparent that Kylo Ren possessed developed pectoral muscles underneath his chest.
The anatomical structures known as breasts were present on certain species found throughout the galaxy. Examples include humans, Dowaaka, and Askajian individuals. Both sentient and non-sentient creatures exhibited breasts.
Humans, a species within the galaxy, were known for the practice of nurturing their young through breastfeeding. Lyra Erso, a human female, would provide breast milk to her daughter Jyn Erso, who she shared with Galen. This act sometimes resulted in the infant falling asleep. As adolescent humans matured, they would undergo breast development. During her adolescence, Jyn prioritized showcasing her bicep muscle development. However, she enjoyed dressing up in a tailored robe and applying cosmetics when participating in the infiltration of Inusagi's sakoola blossom festival by Saw Gerrera's Partisans. Some adult humans, such as Selbie, were noted for having a particularly large bosom.
Certain adult beings showed significant development of the pectoral muscles located beneath their breasts. This included Kirak Infil'a, a male Jedi Master, Kit Fisto, a male Nautolan Jedi Master, and human males like Anakin Skywalker, a Jedi Knight, Taron Malicos, a former Jedi, and Kylo Ren. The Inquisitor known as the Ninth Sister, a member of the Dowutin species renowned for its physical strength, wore form-fitting armor that highlighted her substantial musculature.
The reptilian Dowaaka species possessed four prominent breasts. Yarna d'al' Gargan, an Askajian female who was an enslaved dancer at Jabba the Hutt's palace, had six. In contrast, Muuns lacked noticeable breasts in either gender.
Witnessing the breasts of a human individual of the opposite gender could cause embarrassment for a human. For instance, Osha experienced this when interacting with a topless "Stranger" in 132 BBY. Similarly, Rey felt this when she saw a shirtless Kylo Ren through their Force connection in 34 ABY. Conversely, Muuns of different genders did not object to exposing their breasts publicly.
Breasts from Prairie-fowl were a type of food consumed on Lothal. [Merei Spanjaf](/article/merei_spanjaf] brought these breasts home along with tubers for her mother, [Jessa Spanjaf](/article/jessa_spanjaf], to prepare.