Yep, back in the day, we used psychedelics to stimulate those dopamine receptors. Much less manipulable!

"Now if you're tired or a bit run down,
Can't seem to getcha feet off the ground,
Maybe you oughta try a little bit of L.S.D.

Only if you want to

Shake your head and rattle your brain,
Make you act just a bit insane,
Give you all the psychic energy you need"

• Country Joe MacDonald and the Fish