If you think you know all you need to about the female anatomy, think again.
There's a lot you probably didn't know - and fellas, understanding this biggest myth about a woman's vagina could revolutionise your bedroom antics.
Two sexperts, Dr Nina Brochmann and Ellen Støkken Dahl, have set out to challenge facts about vaginas and their function in their new book, The Wonder Down Under.
Everything you ever wanted to know about sex and the vagina is covered - including how the clitoris works and if the G-spot really does exist.
The clitoris is a cluster of thousands of nerve endings that cause intense sexual pleasure for a woman.
But, contrary to what was always thought, it is actually actually bigger than the raisin-sized nodule on the outside of a woman's genitals.
"One new hypothesis is that the G-spot is not a separate physical thing at all, but simply a deep-lying inner part of the clitoris that's stimulated during sex," Dr Nina and Ellen wrote for Femail.
"We've been brought up to believe the clitoris, the site of all female sexual pleasure, is roughly the size of a raisin.
"But the truth is this little button is just the tip of an iceberg, a small part of a large and extraordinarily sensitive organ that extends deep into a woman's pelvis."
And their revelations don't end there.
Based on their findings about the clitoris they've come up with the ultimate sex tip to help you reach peak sexual pleasure every time - the "CAT" position.
Coital sexual alignment (CAT) takes the missionary position from boring to "oh my" in two simple steps.
Instead of resting on his hands your partner should rest on his forearms and keep his body touching yours.
Then, instead of thrusting he should slide his body up and down yours.
Dr Nina and Ellen have also busted the myth that the Pill can make you fat, suggesting that the real reason women put on weight when they start taking the contraceptive is because they have settled into a relationship.
The Norwegian pair first met in their first year of medicine at the University of Oslo in 2011.
They began by teaching free sex ed classes before realising the confusion and misinformation around women and sexual health.
What began as a blog in 2015 called Underlivit, or The Genitals, has led to their book The Wonder Down Under.
The revelations come after doctors suggested fellas could stop looking for their partner's G-spot, claiming the sexual zone is a myth.