Thanks for the picture book 😂, tho this will enforce what I’ve extensively researched.
But it’s missing a few main points this will only work if people don’t have chapped lips, so stay hydrated…. I don’t think sand paper lips will work well.
Another thing with fingers is trimming and clean under those nails. I don’t think girls like the feeling of their side walls scratched up from jack hammer fingers… and this is why most girls don’t like digits? What I usually do with my finger is feel for these ribs/bumps, 2-3 inches inside on the front side; these ribs/bumps appear only when the girl is aroused. I would use only one finger with the “come hither” motion.
Some girls have really sensitive clitoris, so you really need to learn to read the body. With these girls you’ll need to play with the hood on top or lick around the labia.
If you did everything right she’ll watch you daty, and most girls don’t watch dudes going down on them so that I’ve read. You’ll know when you're in the end goal when you feel her vaginal opening squeezing/clamping all around your finger, her skin will be flushed and there’s usually a wet spot on the sheets from sweat.
Pro tip, when she does have the good old orgasm, just keep doing what your are doing. Don’t speed up/down, don’t change rhythm/pattern it’s coming so don’t change anything. Just keep going and read the body, and taper down by reverse procedure of eating the pussy.