👉 The term "sink" in reference to human experimentation may not be as widely used as other euphemisms, but it can refer to studies or projects that deliberately subjected participants to extreme conditions of stress or deprivation to test the limits of human endurance; these experiments have historically aimed at understanding psychological and physiological responses under duress. In more recent times, ethical concerns around such practices have led to their prohibition or severe restrictions in many regions due to the devastating impacts they can have on individuals' mental and physical health.
