Maybe it's part of a disguise. In the fictional story, the son might need to blend in or deceive someone, and the mom's tennis dress is an improvised costume.
Well, in fictional stories, all kinds of strange and unique things can happen. An adult son wearing his mom's tennis dress could be a way to break social norms within the fictional world. It might be used to explore themes like family dynamics in a very different way. Maybe the son is doing it for a bet, or perhaps it's part of a scheme to make someone laugh or learn a lesson. It depends on how the author uses this situation in the overall plot.
One reason could be curiosity. Boots might seem interesting to a child, especially if they have unique features like high heels or interesting buckles.
One reason is that it violates social norms. Society has clear expectations about what is appropriate for boys to wear, and lingerie is not on that list. Another reason is that it can be harmful to the child's mental health, causing confusion and potential self - esteem issues.
It could also be that the mom is trying to teach her son about gender fluidity or break gender stereotypes. By dressing him as a girl, she is showing that there are no strict rules about what boys and girls can wear. In some cases, it might be a form of art or creative expression within the family.
Maybe the story is about a family that values creativity and self - expression. The mom might see making her son wear girls' clothes as a form of art or a way for him to explore different identities. Another possibility is that it's part of a plot to show the son's journey of acceptance in a community that has different views on gender.
One reason could be for fun. Maybe the mom has a great sense of humor and thought it would be a hilarious idea to see her son in girl's clothes. Another reason might be for a special occasion like a costume party. If the theme is something like 'dress as the opposite gender', she would dress her son as a girl.
One reason could be as a form of punishment or humiliation by bullies. They might force the boy to wear a dress to make him feel embarrassed and weak.
In some cases, it could be part of an attempt to break gender norms in a rather forceful and inappropriate way. Some people might wrongly think that by making a boy wear a princess dress, they are promoting equality when in fact they are violating the boy's will and personal boundaries. The boy may not be ready or willing to cross those traditional gender - based clothing boundaries, and being forced to do so can be very distressing for him.
One possible reason could be that the mom has a strong love for the concept of having a daughter and is projecting that onto her son. Maybe she always dreamed of having a daughter to do girly things with, like dressing up or going to tea parties, and she thinks forcing her son into this 'daughter' role will fulfill that unmet desire.
One reason could be for fun. Maybe the mom has a creative side and thought it would be a hilarious and unique idea to see her son in girl's clothes. Another reason might be for a special event or photo opportunity, like a themed family party where everyone is dressing up in an unconventional way.