The 2D/4D ratio for inferring embryonic testosterone level which shapes the brain as a female or as a male brain. Implications for sexual identity and orientation.

in 1992, a preacher named Gary Chapman published a book titled The 5 Love Languages: The Secret to Love that Lasts . The book was based...

I describe scientific aspects of masturbation in animals from an evolutionary perspective. I explore various hypotheses and evidence

Why don't men have a bone in their penis? This question derives from the fact that many animals have a bone in the penis and, by the way, also in the clitoris (!). The bone in the penis is called the Baculum (1), and the bone in the clitoris is called the Os-clitoris (2). All our primate relatives have one, while we humans, as is well known, do not. Why is it good to have a bone in the penis or in the clitoris? In fact, this isn't even a question for many men with erectile

Sometimes we find ourselves with a potential partner and feel a connection on a different level, something that is difficult to explain...