There is more to the draw than just heat---which does induce the pleasurable release of endorphins.

Hot peppers act as a flavor enhancer, just like salt is a flavor enhancer. The hot peppers are complementary to the flavors already in the food.

That said, there are somethings that I do not add my pepper to: ice cream, breakfast cereal and brothy soups. The dried pepper fails to mix and instead floats on top of the soup making consumption "adventuress"