>The O-spot, sometimes called the C-spot, is located near and on the cervix, deep inside the vaginal canal. (FTR, the depth of your vagina will vary from person to person, but one recent study did suggest that the average depth of the vagina is about 3.77 inches (9.6 cm).)
>The O-spot actually technically behind the cervix, on the posterior wall of the vagina, but you can't exactly get back there. (The only things that can pass through the cervix, really, are period blood, eggs/sperm, IUDs, babies, etc.) There are very few touch-sensitive nerve endings in the vagina and cervix, but there are pressure-sensitive nerve endings, so when you put pressure on the cervix, it can engage this pleasure area. (Helloooo, cervical orgasm.)
>In order to stimulate it, you'll need deep penetration of either a finger, dildo, or penis. "If you're located at the G-Spot, turn your finger 180 degrees, now facing the posterior wall of the vagina, and advance it inside a few centimeters," says Dr. Pai. Some experts choose to differentiate the O-spot and the cervix, but their location is so close (like, on top of each other) that they go hand-in-hand.
>The O-spot is really what makes vaginal sex pleasurable. You do need to pay attention to your body because the cervix is relatively sensitive and too much banging around can cause bruising. Plus, it changes throughout your cycle (usually lower and more rigid right after your period, and higher and softer during ovulation), so be aware of how you feel during sex. If you feel pain or discomfort, stop and take a break or move into a position that allows for more shallow penetration.
what the heck I was wrong. Posterior fornix isnt actually accessible, what happens is that the cervix is pushed into that region, and that area causes pleasure because the nerve is pressure sensitive