A-spot

I searched for information about the A-spot and I found this:

When highly aroused, the uterus lifts up and exposes a tiny space behind the cervix that a partner can stimulate for deeper, more intense explosive orgasms. The spot is usually hidden and is full of pleasurable nerve endings. To help your partner go the distance, try a position that maximizes penetration, like rear vaginal entry or missionary style with your legs up by your head.
An A-spot orgasm comes from the area deep and on the upper wall of the vagina. A cul de sac orgasm comes from the bottom wall of the vagina, underneath the cervix. Women often report that the A-spot orgasm is better than the G-spot orgasm. I believe all women who experience the cul de sac orgasm or the cervix orgasm declare either one to be beyond compare. Barbara Keesling said concerning the cul de sac O, it’s great for when you have a man without stupendous endurance, because it’s the quickest vaginal O. But the trick is that cervix must be up, so you must have tremendous arousal before penetration.https://www.quora.com/What-is-the-difference-between-a-cul-de-sac-orgasm-and-an-A-spot-orgasm-How-do-they-feel-How-long-does-it-take-to-stimulate-properly

https://www.refinery29.com/en-us/a-spot-vagina-female-pleasure
Though the A-spot usually located 5 to 6 inches inside, shorter penises can reach it too, if the receiving partner’s knees are pulled up to shorten the vagina. As with G-spot stimulation, the penis should be aimed toward the front wall, but inserted extra deep to access the A-spot.

Sex educator and pleasure coach Glamazon Tyomi discovered her A-spot while with a partner. “I began to realize how moist I would become in certain positions when my partner was deep. The increase in wetness would also come with a warm, calming, euphoric feeling across my body, and I noticed that it would happen with deep penetration near my cervix... I knew this wasn't something that was commonly experienced or discussed, so I began to do research.

”Positions that shorten the vagina (legs brought closer to the abdomen or chest) can help penetrating partners find the spot more easily,” Tyomi suggests. “I also recommend 'planking' position as a way to locate the spot easily.”

“Fingers can provide the deliberate pressure and steady rhythm that my A-spot likes... I also find it ridiculously hot on a psychological level when a partner fingerbangs me to orgasm this way. It displays a mastery of my body that I find incredibly hot. Toys with curved ends, like the Abby G, are really good at nestling in there and getting at the A-spot, too.

”Our partners love the feeling of our vaginas becoming wetter and tighter, quivering with pleasure… the slippery texture of the A-spot feels good to rub up against.” “The penetrating partner may have to shift a little to the right or to the left, or even shift their partner's legs to one side or the other to access the spot more easily. Patience is key.”

If you continue to hit the A-spot just right, you’ll get an intense orgasm that lasts about 20 seconds longer than any other one. Cadell says that hitting the A-spot should feel similar to the G-spot, without the need-to-pee sensation.