An average vagina is approximately 10 cm long. The lower 1/3 of the vaginal canal is responsive and sensitive.

Up to 1/2 of all men and 1/4 of all women don’t wash their hands after the toilet. Wet hands spread 1 000 times more germs than dry hands.

One rat couple can produce 15 000 descendants in a year. In the US, there are 70 new cases of impotence per hour.