Perhaps it was a result of a deal with the devil, in a more superstitious or fictional context. He might have made a bargain unknowingly, and as part of the terms, he was transformed into a woman against his will. It could also be due to an encounter with a strange, otherworldly force or entity that had the power to change his physical form without his consent.
In some fictional stories, it could be related to a strange artifact. He might have come in contact with an ancient relic that had the power to transform the user's gender. Or, in a more psychological take, it could be a very extreme form of body dysmorphia brought on by some sort of trauma or mental illness that made him feel as if he had been turned into a woman against his will, although in reality, it was a psychological perception.
One possible reason could be a magical or supernatural curse. Maybe he offended a powerful witch or wizard who cast a spell on him. Another reason could be some sort of scientific experiment gone wrong. For example, if he was part of a secret experiment involving hormones or genetic manipulation, and things didn't go as planned.
One possible way this could happen is through some kind of magical or supernatural curse. In many fictional stories, a powerful witch or wizard might cast a spell on a man as a form of punishment or for some other malicious reason. For example, in some fairy tales, if a man offends a magical being, they could be transformed against their will. Another reason could be a scientific experiment gone wrong. Maybe a mad scientist was trying to test a new drug or procedure that had unexpected side effects on the man's body, causing a biological change that made him appear as a woman.
One possible plot could be a curse placed upon him by an evil sorcerer. Maybe he offended the sorcerer in some way, and as revenge, the sorcerer uses dark magic to transform him into a woman. He then has to deal with all the new physical and social aspects of being a woman while trying to find a way to break the curse.
Perhaps a curse from an ancient artifact. If he unknowingly disturbs an ancient tomb or touches a cursed object, it could bring about this transformation. This is a common trope in adventure - themed fictional stories, where characters face the consequences of meddling with the unknown and the supernatural.
One reason could be a curse. Maybe she offended a powerful witch or magician, and as a punishment, she was turned into a mannequin. Another reason might be a deal with the devil - like figure. She made a Faustian bargain and the price was her transformation.
Initially, he could go through denial. It's hard to accept such a drastic change suddenly. As time goes on, he might start to feel depression. He has lost control over his physical form, which can lead to feelings of helplessness. He would also have to deal with the reactions of family and friends. Some might be accepting, but others could be rejecting, which would further damage his mental state. And he would constantly be faced with the struggle of adapting to new social norms and expectations associated with being a woman.
Betrayal could also be a cause. In some fictional tales, if a man betrayed his comrades or a powerful entity, that entity might use magic to turn him into a statue. It's a way of imprisoning him in a form that can't interact with the world anymore. For example, if a knight betrayed his king and made a pact with the enemy, the king's wizard could turn him into a statue.
Maybe it's a case of urban legend or a tall tale that got out of hand. People love to tell extraordinary stories, and if there was someone with an unusual appearance due to a medical condition, it could have been embellished over time into this idea of a man turning into a walrus. Also, lack of medical knowledge in the past might have contributed to such wild interpretations.
He could also start to explore his new identity gradually. Maybe he would learn about the experiences and challenges that women typically face. He might try on different clothes, learn new social behaviors, and in the process, come to terms with his new form to some extent. He could also seek help, either from friends who are more accepting or from professionals who can guide him through this difficult transition, even if it was against his will.
One possible reason could be some sort of magical or supernatural curse. For example, in some fantasy stories, an evil witch might cast a spell on a man, transforming him into a woman as a form of punishment or just for her own amusement. Another reason could be a scientific experiment gone wrong. Scientists in a fictional story might be trying to develop a new gender - changing technology, and a man could be an unwilling test subject.
It could be that the man was dancing too close to her and she felt invaded or harassed, so she reacted by punching him.