how do you get p-waves?

Four sessions is not many. Many of us needed ten times that number before we got results.

It took me almost a year, though not everyone's learning curve is that steep, so don't give up. I obtained the best results starting out by relaxing about 10 minutes with the massager in, then lying on my back and doing gentle PC contractions--the muscles you'd use to cut off urine flow mid-stream--and tickling my nipples. I'd suggest not "trying" this for more than about 30 minutes, repeating this effort every two to three days seeing what feelings you bring about. It's mainly a self discovery process of how to amplify the pleasurable feelings when they start coming. The first stage toward success is learning to recognize the at first unfamiliar sensation of the massager being pulled inward involuntarily by the rectal muscles which tighten around it and nudge it pleasurably into your prostate. Over time, this will become more natural and pleasurable until orgasmic feelings accompany it. It may take a while, but eventually you will experience orgasms as vivid as if you're ejaculating continuously for several minutes but you'll be dry, or at most only a few drops of clear Cowper's gland secretions will come out. Don't become frustrated at whatever rate of progress you have. Just enjoy the feelings along the way as you discover them.