In nature the pleasure that the female receives during sex is irrelevant and the speed at which the male impregnated a female is usually rapid and without any thought to the comfort or pleasure of the female.  This has ensured that over millennia reproduction continued.  Even in human beings it has only been in the last five or 10 decades that a woman's pleasure during sex has come to be considered important.  It is therefore very natural to a young male will climax very quickly and indeed it is unnatural for the reverse to be the case.

Bearing this in mind and understanding that our womans pleasure is indeed important, not only for her but also for us, we need to consider methods to make sure that she is satisfied as well.

The simplest method of lasting a little longer is to masturbate or have your partner masturbate you before intercourse.  Most young men up to the age of around 30 will have no problems achieving a second erection within a few minutes provided that significant amounts of alcohol have not been consumed.  Squeeze technique is also well-known, where the man squeezes his penis with his own muscles, in effect making it as hard as he can consciously and continuing to do so will lessen the feelings and thus delay climax.

These things can be made into a game between the couple involved and if you make sure that she has had at least one oral climax before screwing then the pressure to perform is lessened and the mental aspect will make it easier for you to control when and how you climax.

Of course if you continue time after time to climax within five minutes no matter how frequently you have sex then there is most likely a mental aspect of performance anxiety that you need to address.