BrainStuff Season 3 Episode 13 Why Do Men Have Nipples?

"Why Do Men Have Nipples?" is the thirteenth episode of the third season of BrainStuff. This episode is a thought-provoking look at an age-old question that's intrigued people for centuries. Host Emily Graslie dives into the biology and genetics behind the seemingly strange phenomenon of men having nipples.

Through a series of interviews with experts in the field, Graslie explores the evolutionary history of mammalian nipples, examining how both males and females developed these important milk-producing glands. The episode also delves into the science behind why men's nipples often have less sensitivity than women's, and why some men are able to lactate.

Graslie begins the episode with a brief history of the study of human anatomy. She explains how, for centuries, the male nipple was seen as an anomaly, with many scientists and thinkers unsure of their purpose or function. Ultimately, however, scientists began to unravel the complex genetic and evolutionary reasons behind the presence of male nipples.

One of the experts Graslie speaks with is Dr. Wendy Smith, a professor of biology at the University of Central Arkansas. Dr. Smith explains that the development of nipples in both males and females can be traced back to our shared evolutionary history as mammals. She points out that all mammals, regardless of gender, share certain traits related to reproductive biology – traits that include mammary glands and nipples.

Graslie also speaks with Dr. David Mattson, a pediatrician and lactation specialist, who explains why some men are able to lactate despite not having the necessary hormones or internal structures typically associated with breastfeeding. He notes that, in rare cases, men may begin producing milk due to hormonal imbalances or other medical conditions.

Throughout the episode, Graslie maintains a thoughtful and curious tone as she navigates the scientific intricacies of the male nipple. She poses interesting questions, such as whether or not the increased sensitivity of women's nipples is related to their reproductive biology, and whether or not men's nipples may serve some purpose beyond simple evolutionary legacy.

Ultimately, "Why Do Men Have Nipples?" is a fascinating journey into the science behind one of the most enduring mysteries of human biology. While the episode does not definitively answer the question posed in its title – as science is constantly evolving and improving – it offers viewers a glimpse into the complex and fascinating systems that drive our bodies and our world.