It was kind of a spur of the moment thing, but I've always been curious what it felt like and when I laid down I saw my wife's dildo on the nightstand on her side and decided to try using it. I cleaned it off first and took it slow with a lot of lube. I can see how it can feel good if you do it enough, but it was hard to get used to. Her dildo is tapered a bit in the middle so the head is quite large. I tried to rub it back and forth as if it was someone fucking me but I didn't really feel much more than twinges. But when I turned on the vibration it was a lot more noticeable. I had read a lot about how anal orgasms feel, and I wanted to try to have one, but I was still not comfortable enough with it to really get turned on. Instead, I carefully maneuvered onto my back and pushed my feet up so I could move it back and forth with my heels while I watched porn and slowly stroked. I got hard very quickly and I started to feel the vibrations on what I assume was my prostate, and it brought a whole new feeling to my stroking. It was like there was an electric current that would occasionally jolt through my shaft and feel really good, before going away again, but I could feel the constant vibration from the back was slowly ramping up the warm current of an upcoming orgasm. I paused on a video my wife sent me of her just playing with herself and I had an overwhelming jolt rocket through my dick, which was diamond hard at this point and I let go to try to let the vibration finish me, and I stayed on the edge for I swear almost 30 seconds of agonizing bliss while I was leaking precum constantly (which has never happened before to me). I didn't climax, but the hot burning pleasure was still incredible for that moment before I couldn't take it anymore and rubbed until I came. It was almost too overwhelmingly sensitive when I did, and even though It felt amazing, It was too intense for me to really enjoy.

I might try again in the future, but for now I just wanted to post it somewhere that might enjoy my story, since I don't know if my wife will like the fact I used her toy and I'm scared to tell her. Let me know if you want to hear about a follow up if it happens.

Edit: more detail