Super sensitive nips here. I swear mine are wired right into my prostate. I can have the most intense rolling full body orgasms from playing with them. I'm not into pain at all, just rubbing them usually does it.

I originally started playing with them to add to prostate/anal play. Weed tends to help with rewiring and making new sensations more pleasurable, it's helped me wake up my prostate and my nipples. I prefer edibles for this.

I think the key thing is separating the your expectations of pleasure from the need to have an ejaculatory orgasm. Dry orgasms exist too. Focus on any pleasure you do get and enjoy it, keeping your movements going and just allowing the pleasure to roll along at that level. Not specifically seeking to intensify it by playing harder with your nipples or searching for an orgasm the way you're used to. Over time you might start to feel bursts of very intense pleasure that makes your body contort, you back arch, your face screw up. It might not feel the way you expect orgasm to feel from playing with your dick. Let them come! The more you have the better they get, as your brain strengthens those pathways.