On the Pantra Prostate Massager, the piece of plastic which is designed to rub against the perineum ends in a small ball, the effect is increased pleasurable feelings around the perineum when you contract your arsehole.
The other result of tightening your arsehole is you force the Pantra deep up into your arse, where it pushes against the prostate and so forces the seminal fluid stored in the prostate to be released out of your cock, (one sixth of seminal fluid is stored in the prostate; regular release of this fluid may help reduce the risk of inflammation of the prostate, benign prostatic hyperplasia, a condition which affects a large percentage of middle-aged men at some point or another). As you ejaculate using the Pantra you also experience an intense orgasmic feeling deep inside your arse and emanating from your prostate. Anyone who has experienced “an anal orgasm” will know that ejaculation is accompanied by an orgasmic feeling more intense than any regular orgasm and an orgasm which leaves many on an emotional “high”. You may not always ejaculate each time you achieve an anal orgasm, but ejaculation and orgasm are not the same thing and do not necessarily go together, but if they do then hold on to your hat. If you’ve never shot a load using other anal toys then be prepared to pant like a good ‘un, those juices will flow as you sit on the Pantra. Toa Website]