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...