That's so depressing. In days of not so yore, the only creature more eager to have sex than a college student was a bull in rut. But it makes sense. If you treat sex like exercise and divorce it from the soul, it becomes about as thrilling as a walk on a treadmill. Sure, your heart will race, but it will not be involved.
Pornography palls too.
The first time you glimpse it, your brain sizzles. But the next time your stare isn't quite as wide. And the next, you start noticing hair styles, scars, tattoos and moles. The thrill is definitely gone. You can find hotter on TV almost any night.