Power and control. In some stories, a tyrannical regime or a dictator wants to break the spirit of the people. By making them behave like animals, they lose their sense of self - worth and are easier to dominate.
It could be due to a post - apocalyptic setting. Resources are scarce, and in order to survive, people start acting like animals. They fight over food, shelter, and water. There's no more law and order, so the basic instincts for survival take over, forcing humans to act in a more animal - like way. For example, people might start hoarding food like squirrels or become territorial like wild dogs.
One example could be in some extreme survival situations in the wilderness. If people are lost and starving, they might have to hunt like animals, stalking prey and using basic tools. Another instance could be in certain cult - like situations where people are brainwashed to act like animals, losing their normal human behaviors and following more primal instincts.
It could be for comedic effect or to show extreme emotions in a more visually exaggerated way.
One reason could be punishment. In some strict institutions like prisons, inmates might be given forced haircuts as a form of discipline for misbehaving.
Control. Some institutions or people use forced hairdos as a way to exert control over women. For example, in prisons, the authorities might enforce a particular haircut to make inmates conform and feel a sense of powerlessness.
Often, these can represent a connection to nature. When a human transforms into an animal in a story or drawing, it might symbolize a longing to return to a more primitive, instinctual state. For example, if someone draws a human turning into a deer, it could be about the grace and freedom that the deer represents.
Another reason might be related to traditional or cultural biases. In some areas, if a man doesn't conform to the traditional masculine norms, he might be forced to crossdress as a form of punishment or to 'correct' his behavior. It could also be a result of superstition in some cases, where it is believed that forcing someone to crossdress can ward off bad luck.
Discipline is a main reason. For instance, in the military, short haircuts are part of a strict code. It shows neatness and uniformity, which is crucial for military operations.
There could also be cases related to superstition. If a person was believed to be cursed or bring bad luck, in some backward communities, they could be forced to have a headshave. But this has no scientific basis and is a cruel practice that goes against modern values.
It could be due to errors in the prison system in some very rare situations. For instance, if there is mismanagement in the distribution of medications, a male inmate could accidentally be given estrogen - containing drugs instead of what they were supposed to receive. However, this should be extremely rare as there are supposed to be strict protocols in place to prevent such things from happening.
One reason could be power play. People in positions of power might force others to crossdress to assert their dominance and show that they can control every aspect of someone else's life.