So, now your/their finger is in side, what to do now? This is where the excited state comes into play. Guys, do you know where a girls G-spot is? It is inside the vagina an inch or two on the front wall, right? Same holds true for the Prostate. You will find it by feeling for a bump in the rectal wall about the size of a large walnut, about two to three inches in towards the penis. It will be firmer than the rest of the anal walls but not hard like a bone. This is the prostate.
Now, for most guys now is the time when you will lose your erection. This not a bad thing, it just means that your focus is on a different area. You can leave it be or stimulate the penis until it is hard, it is up to you.
Just a bit complicated so far, eh? Well fear not, now comes the easy part. With your palm facing up and your finger in as far as you can get it, use a “come here” motion. You want to start at the top of the bump (The Prostate) and work down. You can also apply pressure and slowly thrust the finger in and out if that works better for you.