Well, this has to do with a doctor who is also a friend of mine. Several times about a year ago, when I had an appointment, he would ask if I 'needed my tubes cleared', and I was not quite sure what he meant. Finally, I asked him about it, and he told me it was a prostate massage procedure, somewhat similar to a prostate exam that he had done on me before. He said at 53, it would not be a bad idea, and encouraged me to try it.
I was a little uneasy, but I trusted him. He had me lay on my back on the exam table, and then put my feet in the stirrups used for women. He then had me slide down toward the end of the table, which presented him with clear access to my anus. He gloved both hands, and lubricated his right hand and my butt with KY. He then put a finger inside my rectum and found my prostate, and began pressing on it. I asked him how long it would take as it was a little uncomfortable, and he said only a few minutes.
After a minute or so, he started massaging the prostate with some pressure, and I could feel fluid flowing in my cock, which then seeped out of the end onto my stomach. I also began to get an erection, as it felt like he was massaging the end of my penis where it connects inside. When I asked him about this, he said not to be embarassed as his patients frequently got hard during the procedure, and that some even ejaculated during the massage. By this time, I was completely hard, and his talking about me cumming excited me more. He then told me he needed to milk the prostate fluid out of my penis, and took hold of it with his other gloved hand. After he milked it up and down about twice, I exploded with cum going all over me, in one of the most intense climaxes ever.
I have had this done several time since and it is always great.