All you need to know about prostate massage

https://www.verywellhealth.com/things-to-know-about-prostate-health-4066015

How to Do a Prostate Massage

If performing prostate massage for sexual purposes, it often helps to achieve a state of arousal first. Doing so moves the gland into a slightly upward and backward position as the penis becomes erect.

At that point:

1. Apply lube liberally around the anus.
2. Insert an index finger slowly to the first knuckle and start masturbating.
3. Pull the finger out and re-apply lube.
4. As you continue to masturbate, replace your finger back into the anus, this time to the second knuckle.
5. Repeat steps 3 and 4 until you reach the third knuckle.
6. Once the finger is fully inserted, search for a rounded lump roughly 4 inches inside the rectum and up towards the root of the penis. This is the prostate.
7. Gently massage the prostate in a circular or back-and-forth motion using the pad of a finger. You can also apply gentle pressure for seven to 10 seconds, again with the pad of a finger rather than the tip.

I love bringing a man to orgasm this way. Watching him become so aroused that he begs for more as I massage and  masturbate him. I bring him to the pinnacle, then withdraw, until his ecstasy is uncontainable......