Breasts were an anatomical feature on some species in the galaxy, such as the human, Dowaaka, and Askajian species. Breasts occurred in both sentient and non-sentient species.
Humans were a species in the galaxy known to nurse their young. The human female Lyra Erso would breastfeed Jyn Erso, her daughter with Galen, which sometimes led the infant to fall asleep. Adolescent humans would experience breast development as they progressed towards adulthood. When Jyn was an adolescent, she preferred to show off the development of her bicep muscles instead; however, she was pleased to dress up in a fitted robe and cosmetics when she participated in the infiltration of Inusagi's sakoola blossom festival by Saw Gerrera's Partisans. Some human adults, such as Selbie, had a notably ample bosom.
Anakin Skywalker, a Human male, displays defined chest muscles beneath his breasts.
Some adult beings displayed increased development of the chest muscles beneath their breasts, including the male Jedi Master Kirak Infil'a, Nautolan male Jedi Master Kit Fisto, and human males such as Jedi Knight Anakin Skywalker, former Jedi Taron Malicos, and Kylo Ren. The female Inquisitor known as the Ninth Sister, a member of the Dowutin species that was known for its physical strength, wore fitted armor that exhibited her large muscles.
Members of the reptilian Dowaaka species had four large breasts. The Askajian female Yarna d'al' Gargan, who was an enslaved dancer at Jabba the Hutt's palace, had six.
Prairie-fowl breasts were a food eaten on Lothal. Merei Spanjaf brought them home with tubers for her mother, Jessa Spanjaf, to cook.