Cravings

There are several core theories about why we crave things, whether specific foods or drugs or activities or people, and most of these theories are predicated on our relationship with our neurological reward systems.

Our bodies and brains have evolved to nudge us toward behaviors that keep us alive long enough to pass on our genetic materials.

Thus, doing things like eating foods that provide us with proper nutrition tends to be rewarded by our bodily systems: we're primed to pursue certain types of nutrients, for instance, and that priming is reinforced by endorphins—a type of feel-good opioid our bodies produce—when we eat the right things.