I'm sorry, but I want things to be clear: I will try to describe in detail and carefully everything that this practice entails, but I will not talk, here, from experience. My lesbian friends and a few heterosexuals assure me that when done right, it's not painful. But I assure you that my practicing friends, if I may call them that, have verified the information I provide and guaranteed their accuracy. Let's get going.
The following is for both heterosexuals and lesbians. Regardless of a group's sexual preferences, fisting is not a specific or common practice, but, marginally, it seems more common in lesbians, which is why I will discuss it here.
Do you totally trust the person you are preparing to fist with? Let's say things by name: even if we all know that on one side a child can come out and on the other side giant feces can come out sometimes, the person who has not yet gone through the experience of putting a whole fist in one of the holes must to have total trust in the partner who wants to try something like that.
There is a correct way to do it: as in the case of anal sex, a certain procedure must be followed and not be forced blindly.
Rule no.1: Do not risk fisting for the first time if you drank (a little more) or if you took drugs, because you must be perfectly aware of what you are doing. In addition, these substances tend to decrease the intensity of sensations, so what seems absolutely wonderful today becomes terribly painful the next day.
Rule no. 2: The sensation may not be pleasant, especially the first time, and you may feel more discomfort, not necessarily pain: in fact, it should never cause pain. Stop if you feel the need or if bleeding occurs. Some of my friends say that it is normal to bleed a little, but I remain a firm supporter of the "blood is forbidden" rule.
Rule no. 3: As with anal sex, it's not something you have to do on time and all of a sudden. Work patiently, remember that practice is basic and that sometimes you have to give up certain things simply because they are not possible. Some women have too small a vagina or their partner's hands are too big. Likewise, the back of some individuals will never be able to bear this.
Step by step guide for vaginal fisting
Basic guide:
Check that there is nothing to hang or scratch, respectively nails or on the hand: remove rings, bracelets, watch, etc.
Be prepared and do not be shy with the foreplay: the partner must be aroused enough for the vagina to dilate. At the right time, lie on your back with your knees bent and lean on your elbows and knees.
Start with one finger: Slowly insert two, then three, then four fingers.
If he tells you she's ready, squeeze your fingers like a duck's beak so that your hand is as narrow as possible.
You will insert it slowly, with your palm up and your thumb folded.
Always make sure that your partner breathes deeply: he must exhale by pushing down, to relax the muscles of his vagina, as if giving birth, so that he remains in control of the situation.
Continue to slowly lower your hand, turning slightly from the wrist: reaching the vagina, clench your fist well, with your thumb inside.
Don't move: You've succeeded, you're inside. You're probably horny at the top, and she's totally vulnerable.
Stay in this position until she tells you you can move.
Make small movements: the thicker the inserted object, the less wide and gentler the movements must be. Try, for example, to rotate your fist or tighten / relax it.
Go back and forth only when she tells you she's ready.
Add lubricant: if you think this practice is difficult with lubrication, imagine what it would be like on land!
Prepare your way out when you have come to the conclusion that it is enough: Tell him that you will go out. He will anticipate this by taking a deep breath and pushing down. Retreat gently and slowly, following in reverse all the instructions from the moment of entry. Even if you panic a little and want to get out of there right away, don't shake your hand all of a sudden. Tell him you agree, but keep sliding your hand out with slow, gentle gestures.