"When a man goes out of a room, he leaves everything in it behind... when a woman goes out she carries everything that happened in the room along with her." - Alice Munro

Supplementary videos

Hermaphrodite flatworms mating (penis fencing)
Hermaphrodite leopard slugs mating in midair
Meiosis, crossing over, and the SRY gene: XX males and XY females (HHMI)
Everything You Never Knew About Sex 10:50 "Why do men have nipples?"
Sponges spawn without mating rituals
Male Alpine Newt courts female with sperm packet (6:00)
Surinam toad exhibits maternal care
Great Zebra Exodus: parental care of young
Calico cat and X inactivation: random deactivation of an X chromosome

Extra credit readings

• Social hierarchies: Size and growth modification in clownfish Nature 7/10/03
• Why do men have nipples? 6/18/79
• Mouth-brooding frog is Species of the Day! Zoological Society of London 4/12/10
• The Way to a Female Katydid's Heart? Offer Her Food LiveScience 9/27/11
• Indonesia's birth control pill for men GlobalPost 2/27/11
• Fecal Transplants: They Work, the Regulations Don’t Wired.com 12/9/11
• What Fixes Low Testosterone Best: Meds or Porn? Newsweek 5/20/09
• How Chickens Lost Their Penises (And Ducks Kept Theirs) National Geographic 6/6/13
• Study links estrogen exposure to fish kills, disease Greenwire 6/4/09

Additional material

• Tettigoniidae ~ Katydids: females eat spermatophore

---

Home	© Copyleft Peter 2.0