Hi, This is a common problem of having premature ejaculation. Before going to intercourse go for some foreplay like kissing, pushing, patting, verbal talking etc by which your partner will get high sexual excitement and just going for climax. At this time you go for intercourse. Within short time she will reach her climax and then you may ejaculate. During intercourse you divert your mind from sex and think other than sex, this will also prolong your ejaculation. In this type of problem Viagra gives good result so you may go for Viagra after consulting your doctor. Ok and take care.