People differ in the time they need to come to orgasm. You might get excited very rapidly and climax within minutes. But it can also take up to half an hour.
  During lovemaking you may have discovered that you and your lover need a different amount of time to come to orgasm. Once you start to realise this you can adjust the pace of lovemaking: the one getting excited very fast holding back, while the one who needs much time getting more attention. 
During masturbation the time girls and guys need to climax does not differ dramatically. But during lovemaking girls often need more time to come to orgasm then guys.
The chart can help you to understand the similarities and differences between you and your (future) lover.