According to one theory, people who chew a lot of ice have a high sex drive.

According to psychologists, the shoe and the foot are the most common sources of sexual fetishism in Western society.

According to the World Health Organization, there are approximately 100 million acts of sexual intercourse each day.

Back in 1919 the Russian transplant pioneer Serge Voronoff made headlines by grafting monkey testicles onto human males.

In 1969, Iowa State College conducted a survey indicating that a parent's stress level at the time of conception is a major factor in determining the child's sex. The child is usually the same sex as the less stressed parent.