Women by Eugene Stroynov
This is how I live. This could just as well have been my wife tormenting me.
After about 20 minutes of this, he will be exhausted, begging for it to stop, feeling completely drained, but yet still very horny and totally unsatisfied. She will have eliminated his need to cum, but have maintained his erection, so it would be available for her to enjoy as she chose without fear of him ejaculating.
Deep and slow prostate massage with a firm grip on the base of his cock, never stroking it or touching the head.
Hear him moan. See him leak.