Final answer:
In the Minnesota Starvation Experiment, men on a semistarvation diet lost interest in sex and social activities.
Step-by-step explanation:
Ancel Keys and his colleagues observed that men on a semistarvation diet lost interest in sex and social activities. This was one of the findings from the Minnesota Starvation Experiment conducted during World War II. The study aimed to understand the physiological and psychological effects of starvation on human beings.
During the experiment, the participants experienced significant weight loss and a decline in their overall well-being. They became apathetic and lost interest in activities they previously enjoyed, such as sex and socializing. This suggests that the body's response to starvation can affect not only physical health but also psychological aspects of a person's life.