His own hand or 5 dollars worth of silicon can create that "unique" pleasant sensation. You need to provide a better argument than that for me to talk to you about this. A man is exausted and jaded for days after sex, prolactin release, the refractory period etc. Its natures way to limit an alphas ability to spread his seed in the population. Sexual energy and Semen Retention can transform a man totally if he has the discipline not to release it for a couple of seconds of pleasure. He can still have sex once he has become grounded in the practice and his brain has undergone changes which usually takes 6-12 months, then he just has to avoid orgasms to keep the benefits.