Then you need to know that nearly a third of women over 80 still have sex with their partners. Wow, some of these are really disturbing! Start Your Writing Now! For men under the age of 40, their average time to erection is a mere ten seconds. During intercourse, your inner nose swells just as your breasts and genitals will. A study showed that women who viewed footage of chimpanzee sex became sexually aroused and experienced vaginal lubrication.