I don't know if this will help of not, but recently I was reading an article online and it was mentioned that doing "Kegal exercises"helps you control your ejaculation, make you last longer in bed, etc.
Not really sure what exactly does Kegal exercises mean (Reading more about it now), but it might help your problem. No harm in trying it.
This link might be useful in understanding more about it-
http://www.askmen.com/dating/love_tip_60/67_love_tip.html
Any bros around here who knows about it?