Human sexuality

Category archives for Human sexuality

Catching Fire. The other one.

Catching Fire is apparently a very popular book and/or movie that everyone is very excited about. But Catching Fire is also a book about some interesting research I was involved in about the origin of our genus, Homo. You can pick up a copy of our paper on this page. We call it “The Cooking…

Penis Size: Does it matter and why?

A study just published in the Proceedings of the National Academy of Sciences explores the question of penis size and female preference in humans. The study involved making a set of 3D models of human males of various relative body sizes, and fitting them out with various size flaccid penises. These were shown to a…

Humans appear to have a great deal of variation in sexual orientation, in what is often referred to as “gender” and in adult behavior generally. When convenient, people will point to “genes” as the “cause” of any particular subset of this diversity (or all of it). When convenient, people will point to “culture” as the…

The Kiss

Valentine’s Day is coming up, so it is time to think about kissing. Pursuant to this, Sheril Kirshenbaum, author of “The Science of Kissing,” has made the Kindle version of her excellent book available at a discounted price through February 18th. The book is here: The Science of Kissing: What Our Lips Are Telling Us.…

A study has just come out in the Journal of Sex Research comparing various psychological and lifestyle measures of women who act in pornographic films with matched sets of women who do not. There is a pretty clear association between negative attitudes towards pornography and negative assessments of the quality of life for actresses in…

Falsehoods: Human Universals

There are human universals. There, I said it. Now give me about a half hour to explain why this is both correct and a Falsehood. But first, some background and definition.

Human infants require more care than they should, if we form our expectations based on closely related species (apes, and more generally, Old World simian primates). It has been said that humans are born three months early. This is not accurate. It was thought that our body size predicted a 12 month gestation, and some…

Why do women shop and men hunt?

Or, when the hunting season is closed, watch teh game (the guys), or when there are no sales, admire each other’s shoes (the gals)? This is, of course, a parody of the sociobiological, or in modern parlance, the “evolutionary psychology” argument linking behaviors that evolved in our species during the long slog known as The…

Sex at Dawn

From Skeptically Speaking: We talk to author Christopher Ryan about his new book Sex at Dawn: The Prehistoric Origins of Modern Sexuality. We’ll discuss the most recent science and theories, and how social norms compare to our biological impulses. This Friday. Details here. I may have to read this book.

They say a picture is worth a thousand words. In a recent post, I relied on this principle but I think it did not work for a lot of readers. So I want to try this again but using additional words to augment the pictures. This is about the sex-appeal of the skepchicks.