Why does smoking marijuana make you hungry ?!

The active ingredient delta-9-THC (if I remember any of this correctly) is absorbed into the storage depots of the body and stimulated the CB1 receptors. They've been studied but their exact mechanism and function is unknown. They're thought to stimulate memory and apatite.

But idk man, if I had to guess, a lot of drugs promote the release of dopamine etc into the brain, and that stuff takes energy and adds a lot of stress on the body. To account for some of that stress, and to provide the brain with the energy and resources it needs to create the feel good effect, you get hungry so your body can have the resources it needs to make all those chemicals.

yeah it gives you the munchies lol