A serious post on Motherless??
1) If you typically have sex at night then wank in the mornings to reduce the hours of 'build up'.
2) Make sure you both spend some time on foreplay/oral to get used to the sensation for a bit before penetration.
3) Lightly tap your bollocks until they start to ache a little bit (sounds a bit crazy but sometimes that slight dull ache can help). You could even get her to try this during oral sex.
4) Pull out when you can tell things are going too quickly - spend a few minutes licking/fingering her instead so you can calm things down again.
5) There's a muscle in the penis that tends to get used during ejaculation. Exercising this muscle will help you to control it better. The best way to exercise it is to try and stop yourself from pissing - it's the same muscle. The more you exercise it the stronger it will be and the more control you can have over it.
