I first started masurbating when I was 11. I was in the rest room in my home and I suddenly got an erection thinking of sex that I saw through a small crack hole between my bed room and that of my elder brother and my sister-in-law. The water commode was situated above with two pipes on the side holding it. And of course a pipe ran down from the commode to the flushing toilet. I climbed up holding the pipes on both sides of the commode and started rubbing the place between the balls and the rectum on the pipe running down (DO NOT TRY THIS AS YOUR PIPE MAY BE WEAK AND YOU MAY FALL DOWN). After rubbing for a few seconds I would cum. Now I know I was exciting my prostate. But I am still surprised even now how I would cum without stroking my penis. I used to do this every day.
Sometimes I made a round pussy like hole with a paper and rubbed my penis through it to cum. When I was 15, I would make a dummy female with a pussy by putting a shirt inside pants and filling them up with cloth so it looked like a female. I would place two, inflated balloons inside the shirt to look like breasts. I would then take a plastic bag and shove it inside the front of the pants and pour cream inside the bag. I would lay down the dummy female and stroke my cock inside the lubricated plastic pussy to cum.
Then I made a hole on the side of a pillow and I placed the lubricated plastic bag in the hole. I would stroke my cock in the fake pussy of the lubricated plastic inside the pillow. This became my routine for masturbation for years.
Then I got married. One day while I was sucking my wife's nipples, she sucked mine too. It felt so good that I came just by her sucking my nipples. I started inventing new ways to masturbate by exciting my nipples and cock. I would twist my nipples with one hand and stroke my cock with the other. Many times I would ask my wife to suck my nipple while I stroked my cock to cum. She would ask me also to suck her nipple while she stroked her clit.
I started experimenting. I would make a dummy female as described above and make a suction tube attached to a cap. Now I could masturbate by shoving my cock inside the fake pussy while sucking my own nipple through the plastic tube with a cap placed on my nipple. Another way I have made a fake pussy is by placing a lubricated plastic bag inside a rolled pillow tied with a rope.
I am 61 now and my routine masturbation method is to gently twist and suck my own nipple while stroking my cock.