I went from using fountain pen (it had rounded top and no pen clip) - first anal-only hands-free wet orgasm - it was hard since I wasn't used to ejaculating this way but I did. I had to hit parts that felt like "I had to pee" which seems like a sturdy wall up there.
, then later I went and made some makeshift dildo. it uses a "bath salt / usb storage test tube (acrylic?)" attached to a large thin and flat surface with a hole so it sits right up with the cap on the bottom side - best DIY toy you can make if you haven't had the heart to buy dildos >>11352992
this gave me consistent anal orgasms just sitting on it - wariza sitting and leaning back is the technique, used it almost daily or 3x/week although before the fountain pen I did try putting things up there like shampoo bottles or using fingers but it was more of something uncomfortable - I know about the 1manjar thing so I avoid hollow glass. also the part I hit with my DIY toy felt like I had to shit - it was clearly my internal sphincters in the way of the prostate still I would achieve HFWOs with this.
, after a long time my country started to have local shops selling dildos - it wasn't that mainstream so I bought a 4.5" and 6" one (minus an inch for total insertable length) it was sadly disappointing as the tube despite being thinner felt thicker since it was unrelentingly harder and more tactile. later the dildos would still prove to be useful. I was used to hard round-pointy stuff, this was flopping around and no they don't even sell dual-density to this day, but it is still fun to use it just doesn't give me the release my usual DIY test tube toy would give. It did work with few HFOs but it had bad suction and I have to lean backwards to the point I'm lying down. I bought some water-based lube later and it felt nice but it's different to the focused pressure a sturdy toy gives.