Creative energy and sexual energy appear to be deeply correlated. A person with a high libido often has to direct that energy somewhere meaningful, otherwise it begins to overwhelm them and pull them away from themselves. The intensity has to go somewhere and has to create.
Sexual energy is the energy of creation. It is the force that draws two people together, dissolves barriers between them, and opens them to something larger than themselves. The entire process is oriented toward creation, whether that creation takes the form of a child, a deeper bond, a transformation of self, or simply an expansion of life.
When that energy is not being expressed within a relationship, it often seeks another outlet. it can be anything from art, business, writing, music, invention, philosophy, or obsessive craftsmanship. The same force that creates life can also create worlds.
Perhaps this is why some of the most creative people seem possessed by their work. They are taking an immense reservoir of life-force and converting it into something that can exist outside of them.
Carl Jung said that one of the most destructive forces a person can carry is unused creative energy.