fingering is a trial and error science.. what feels good to one woman might not work for another.. though there are a couple of things i can tell you from experience... 1- dont just go cramming your fingers in there. warm her up a bit by rubbing her clit and lubing your fingers with her juices 2- when you have you fingers inside her turn your hand palm up and curve your fingers.. you will feel ridges.. just behind that is her g-spot.. massage it and she will cum like never before 3- some gals like having their clit licked while being fingered so be prepared for a little tongue action i hope this helps you some
Make sure your nails, cuticles, etc aren't rough or sharp. And would you want rough sandpaper skin in your ass? You're going into very tender territory. What may seem slow and gentle to you, the penetrator, may be extremely uncomfortable for the recipient. Do unto others as you would wish for yourself. Unless you've announced that you're going to be fingering the anus of your s/o, or she's asked you to stick a finger in her ass, I recommend some conscientious preparation as you move towards your objective. If you like eating her pussy, then there's no reason why you can't move on to her anus. If she's clean in the front, she's probably clean in the back. There are three things of yours that you can put in her ass: your fingers, your tongue, and your dick. I assume that your ultimate goal is to fuck her ass. If you work on your goal in a gentle, methodical way over a period of time, eventually your s/o may ask you to fuck her ass. In fact, if you've done your job well, she may beg you!