However, this study suggests that some of those same forces of nature may also affect the sexual behavior of men and women.
Even if it's as small as sucking down a few too many cocktails when you may have told him you 'don't drink much,' he'll wonder if he sized you up all wrong in the first place.Doubting his own judgment isn't a comfortable feeling—it's something every guy dreads.— you don't want to be different from how you're advertised.This content has not been reviewed within the past year and may not represent Web MD's most up-to-date information.To find the most current information, please enter your topic of interest into our search box.
" The study involved 68 sexually active women who kept a diary of sexual intercourse and provided daily urine samples for three months.
All of the women were using an intrauterine device or had had a tubal ligation to protect against pregnancy.
Previous research has shown that the five days leading up to ovulation and the day of ovulation are the days in a woman's menstrual cycle when she is most fertile.
Increasing the frequency of sexual intercourse during these days increases the chance of pregnancy.
Researchers say that in mammals, this fertile period is often coordinated with intercourse through fluctuations in libido, and in some animals, ovulation is happens as a result of intercourse.
But neither of these biological mechanisms has been established in humans.