This works best when I rub it (the perineum nerve) the same way I would tounge a womans clit. I start breathing in gentle spasms, and have a very subtle irritation like i have to pee. Then the orgasm spreads to my entire body. It's like floating on an endless silk cloud and I keep it going with just the tiniest of contractions to my lower abdomen or diaphragm. My penis stays rock hard without any stimulation like a big clit. I'm oblivious to pain and can pinch my own nipples till they bleed and feel nothing but pleasure.