Pleasure Control Experiments in 1950s

There were experiments conducted in the 1950s where researchers gave their subjects manual control over the pleasure centers of their brains through the click of a button, wired to surgically implanted electrodes. One patient clocked up 1,500 doses in a three-hour period, but overall, they showed surprising restraint, unlike rats that underwent the same procedure, which self-administered to the point of exhaustion.