Among a number of problems related with the sexual health of men and of course his partner, we find Premature Ejaculation as the most common sexual problem , this is a pathology characterized by a lack of voluntary control over ejaculation. Masters and Johnson stated that a man suffers from premature ejaculation if he ejaculates before his partner achieves orgasm in more than fifty percent of his sexual encounters. Other sex researchers have defined premature ejaculation as occurring if the man .