Do a search here on Dostinex(generic name). It is aa anti-prolactin, and studies show that it can illiminate refractory time in men, and increase orgasm intensity. There is a link to an increase in prolactin levels during an post orgasm in men and reduction in sexual interest until the prolactin levels drop(ie refractory period). There was a study done on Peter North that upheld these findings. Look for the study, it makes an interesting read!