[EvilEvilKitten]

The Program, guys. Find it. Read it. Do it.

Also:
1. Get the lady's blood up BEFORE going for penetration. If possible, give her at least one orgasm before you go in.
2. masturbate before enjoying sex with her
3. focus OUTWARDLY more - think of her, listen to her body, watch her responses, stimulate two or more areas at once - which should give you enough to do to keep your mind off of yourself.
4. do edge play which is to masturbate ALMOST to orgasm and then stop and then repeat then stop then repeat then stop - you get the idea. You can 'train' yourself in this way to last as long as you wish.
5. find a nice dominatrix who will help you out with this problem and she'll train you

Also consider that you may NOT be cumming too early but that your lady partner may be cumming too late - FIRE HER UP and see what happens to you.