pahadi dai.......i know one better solution for that although i dont have the problem like urs....try this "suifans kwang tez solution".U can google it....costs u less than 15 bucks......

"BUT BEWARE USING TOO MUCH OF THIS THING  MIGHT END U  EjaculatED....."

its a chinese herbal medicine.........spray it on ur penis  like an hour before u have sex.....i bet u ll like it......................

it has its cons too.....ur GF might not like  going down on u.......it tastes aweful(thats what my GF used to tell me )but great though....................highly recommended........