According to a 1950s survey, 75% of men ejaculate within two minutes of penetration.
109
Chewing gum boosts your brain power.
285
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The male fetus is capable of attaining an erection during the last trimester.
75
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Smoking while pregnant increases the chances of spontaneous abortions (miscarriages) stillbirths and premature labor.
77