Men should have dresses, period. For instance, the traditional Japanese kimono: https://www.aliexpress.us/item/3256804448868616.html?gatewayAdapt=glo2usa4itemAdapt
Or the Indian kurta: https://www.chirosbyjigyasa.com/blogs/fashion/5-regional-styles-of-mens-designer-clothing-in-india
These would make it much easier for shy teenage boys to hide their erections. Plus pants can be worn underneath when it is chilly. I wear skirts almost all the time. They flare from the waist and hang either slightly below my knees or at my calves. They are by far the most comfortable type of clothing.