<strong>Rethinking Genitalia:</strong> We're a culture obsessed with human bodies, gender and the morphological differences between male and female. But what happens when we consider gender reversal in nature, as well as the amazing sex-reversed cave insects of the <i>Neotrogla</i> genus? The females of these species boast a penis-like, sperm-collecting "gynosome," which fits perfectly inside the male's sperm-offering "<span class="st">phallosome</span>." Listen to this episode of Stuff to Blow Your Mind and turn everything you know about gender on its head.
Image: © Mike Agliolo/Corbis
List: Top 10 Mindblowers: Sex
Podcast: The Penis Episode, Part One
Podcast: The Penis Episode, Part Two