It's not just in your head, but all around you, too! What I mean by this is that when we are in the presence of our lover we become turned on much much more than when we are alone masturbating. This is because of the emotional connection as well as pheromones flying in the air between you, not to mention the proverbial "sparks".

Please read around on the subject of Premature Ejaculation. I have written extensively on the matter and discuss an exercise the two of you can do to help stop the problem. Do an advanced search on the Board using my name and the following:

PE or P E
Premature Ejaculation
exercise