Humans lost their penile spines during millions of years of evolution. People believed ‘humans evolved smooth penises as a result of adopting a more monogamous reproductive strategy than their early human ancestors. Those ancestors may have used penile spines to remove the sperm of competitors when they mated with females.’ But it is not the …
About the Author
Freethought Blogs
- A Citizen of Earth
- A Million Gods
- Ace of Clades
- Alethian Worldview
- Almost Diamonds
- Ashley Miller
- Biodork
- Black Skeptics
- Blag Hag
- Brute Reason
- Butterflies and Wheels
- Comradde PhysioProffe
- Dispatches from the Culture Wars
- En Tequila Es Verdad
- Greta Christina's Blog
- Heteronormative Patriarchy for Men
- Lousy Canuck
- Mano Singham
- Maryam Namazie
- Near-Earth Object
- No Country for Women
- NonStampCollector
- Pharyngula
- Reasonable Doubts
- Richard Carrier Blogs
- Rock Beyond Belief
- Sincerely, Natalie Reed
- The Atheist Experience
- The Crommunist Manifesto
- The Digital Cuttlefish
- The Indelible Stamp
- The Zingularity
- This Week in Christian Nationalism
- Token Skeptic
- YEMMYnisting
- Zinnia Jones
FTB RecentFTB Active
FTB Recent
- A Very Uncomfortable Place by Stephanie Zvan
- An opening prayer we can live with? by Mano Singham
- The 2013 Rock and Roll Hall of Fame by Ed Brayton
- the MARCH of REASON documentary film by aronra
- 23½ by PZ Myers
- Terror and the Unknown Soldier by Ally Fogg
FTB Active
- [Lounge #419] by PZ Myers
- Open thread on episode #814 by heicart
- Leave Dan Brown Alone! by Ed Brayton
- Cis people: Help me get a sense of the landscape out there! by Zinnia
- Taking it Personally: Privilege and Women in Secularism by Ashley F. Miller
- #RDFbullies by Ophelia Benson

Recent Comments