Let's say that you want to brainstorm for a business idea. When you are aroused, use your will-power to turn your mind to your business, and turn that arousal and state of lust over to the problem or challenge. And imagination is the primary tool of genius, as it is the gateway to intuition and infinite wisdom.
You've obviously given it a lot of "rational" conscious thought and not really come up with anything. You can actually shift your desire for your lover over to the problem or rather to the solution to the problem. Simply imagine that you are equally turned-on by the idea of getting a solution to this problem. Then focus on your area of work and what you want to achieve in it.
When you are hungry, take a piece of fruit into your mouth and just "hold" it there ...
see how long you can go without actually chewing it, just close your eyes and taste it, feel its texture, savour everything about it.
Under the rules of courtly love they can let their passion flow unbridled as long as they don't engage in physical intercourse. So while Sir Loves Tolancealot and the Lady Prettipuss might engage in sleeping together nude, nude caresses and embraces, they can't and won't copulate!
These relationships ignited their imaginations and lifted their psyches to new levels of emotional intensity and feeling, much more than ordinary sexual pairings did.
So learn to tease your desire and hold it at fever pitch, because arousal will benefit you mentally and spiritually.
You can do it with anything you want - it doesn't have to be sex, though sex is the most effective.
On the one hand, if you have sex and ejaculate and lose bodily fluids, it is said that you are weaker physically and mentally for a period of time after. Please refer to the following books for detailed instruction.
The art of Chi Kung and particularly Sexual Chi Kung is too complex to convey here.