It's a good feeling as a man if you can get a woman aroused. Unfortunately some problems may also arise in this respect. For instance some gentleman suffer from 'ejaculatio praecox', i.e. premature ejaculation. What does this mean?
Premature ejaculation means that men already ejaculate within one minute of penetration, he's unable to control his ejaculation. You've just begun making love, and then it's already over. Of course it's not pleasant for both men and women.
Normally a man is able to withhold his ejaculation for several minutes. On average, a penis is in the vagina for about 5 minutes until orgasm. All together sex last for about 15 minutes on average. An American study shows that the respondents are generally ok with this.
Right before orgasm there's a so-called 'plateau phase'. However, with premature ejaculation this phase is left out. This can have several causes:
Also certain sexual acts may be too stimulating. Men with little sexual experience usually cope with this. Over time, they learn to control their arousal better. When a man gets an orgasm after slightly touching the penis, there's something going on. In that case it's best to consult your doctor. A doctor can give you advise or refers you to a hospital or sexologist.