Here's a new blog by author Lynn Saxon, who wrote a book that thoroughly discredits Christopher Ryan's "analysis" in Sex At Dawn. Her own book is called Sex at Dusk.
http://www.goodreads.com/author_blog_posts/4153801-sex-and-science
Reviews of her book can be found here: "Sex At Dusk"
Ryan has been denying she is a real person - even though she debated him thoroughly on Amazon, before she wrote her book.