As 2009 comes to a close, LiveScience looks back at the year's nine most intriguing sex lessons.
Figurines of Aphrodite found buried in ancient city; hint pagan beliefs still around despite spread of Christianity.
The sperm of one male may have to compete with those from another. How and why they do it is surprising.
The disparities between what younger people expect will happen as they age, and what really happens, are stark.
Unsexy as it sounds, there are some health risks and practical concerns associated with summertime sex.
Men who ate antioxidant-rich fruits and vegetables have better rates of sperm movement, ejaculate volume, and sperm concentration.
The tenets of sexual health need to be addressed and upheld, and political and religious leaders should lead the charge.
While oral contraceptives are effective in reducing the risk of unwanted pregnancy, its effects on the human body – both good and bad – have been cause for debate.
A recent study discovered that men feel guiltier following sexual infidelity, while women feel guiltier after emotional transgression.
A new study on reproductive success finds that humans don’t always conform to the roles of "promiscuous" males and "selective" females.