>>939619324
personally i just forced myself with the finger. i didn't interact with my pp for several days and just played with my prostate while imagining that i'm getting a relief. eventually my frustration built up so much that on the 10th day i came
anyway, you seem to have tried a lot. perhaps you're not approaching it with a proper mindset
try to imagine yourself cumming. twitch your prostate muscle as if you're ejaculating. focus on the gentle, warm touch of your finger. imagine that someone is playing with you and wants you to have fun. alternatively watch some hentai with femboys getting plapped and imagine how it must feel. think of yourself as a delicate cutie who likes it in the butt
if you start to get super hard in the middle then you're on a good path
if all that fails, you can also try classical conditioning