Desire is increased when someone we desire it's distant from us. So our imagination start to work, and for some other reasons, we end up to desire that person even more. You can also see this when you have a "verbal" fight with your wife in the morning, then go to work both, and come back home at night, and you both can't resist to realease all the day tension in sex.

But.. how do you keep this desire and striving emotion for the other person when you are with this person?

I mean, that we maybe don't have all the same lives and 9to5 jobs, but for some of us, it can occur, to work with his partner, or just to be with his partner all day. How do you manage this?